The deploy-platform rivalry: Cloudflare carries the CDN/edge conversation for years, then Vercel surges on the Next.js wave and the two trade blows as both push into edge functions and full-stack hosting.

David vs Goliath of the lab era: OpenAI's repeated towers lead from 2023, until a sudden 2026 Anthropic surge pulls level and the lead changes hands.

The silicon baton pass: AMD leads 2017–20 on the Ryzen/Zen comeback, then Nvidia overtakes with the 2020–23 GPU-and-AI surge.

A three-way relay across the JVM/mobile era: Scala is the hot language ~2011, Swift grabs the baton with iOS mid-decade, then Kotlin overtakes both as Android goes Kotlin-first.

Frontend's generations in a line: Angular leads the framework wars ~2013–14, Vue rises 2016–19, then Svelte takes the newcomer crown 2020–22.

The database lead-swap: MySQL owns the conversation around 2009–11, then goes quiet as Postgres climbs to overtake it by 2017–20.

ML frameworks, generation by generation: TensorFlow launches the deep-learning gold rush 2015–16, PyTorch overtakes research 2019–21, then JAX becomes the cutting-edge favorite 2021–23.

Bundler changing of the guard: Webpack owns the build step 2015–20, then Vite arrives and overtakes it from 2022 on.

Crypto-exchange lead-swap: Coinbase is the exchange people talk about through 2013–21, then Binance takes over the headlines in 2022–23.

The editor wars, old guard vs new: Vim and Emacs trade the modal-vs-extensible argument year after year, then Zed bursts in and spikes hard across 2024–26.

The Twitter-alternative relay: Mastodon spikes with the 2022 acquisition exodus, then Bluesky overtakes it as the destination in 2024–25.

Node-alternative race: Deno is the buzzy replacement 2020–22, then Bun grabs the spotlight from 2023 onward.

A textbook changing of the guard: Flash burns hot across 2010–11, then HTML5 climbs past it into 2014–15, the open web eating the plugin alive.

Containerization handoff: Docker erupts 2014–15 as the new hotness, then Kubernetes inherits the spotlight from 2016 as orchestration becomes the story.

Succession within a dynasty: vim leads through the 2010s, then its own fork neovim ignites 2021–23 and takes the lead as the community migrates.

Two AI shockwaves, offset: ChatGPT's late-2022 launch wall, then DeepSeek's lone Jan-2025 tower, the “Sputnik moment” years later.

JS-superset succession: CoffeeScript's 2011–14 hype cools, then TypeScript's 2019+ rise shows which abstraction actually won.

The 2022 text-to-image explosion, month by month: DALL-E 2 opens the era in spring, Stable Diffusion's open-source release detonates in late summer, then Midjourney becomes the household name into 2023.

A CPU-architecture shift: x86 dominates chip talk around 2020–23, then ARM surges with Apple Silicon and data-center ARM into 2024–26.

The text-editor crown, passed hand to hand: Sublime Text is the beloved editor of 2012–14, GitHub's Atom takes over 2014–15, then VS Code eats the world from 2018 on.

Video calling, dynasty to dynasty: Skype owns the 2010s, then Zoom spikes hard in the single March-2020 lockdown month while Microsoft Teams rides the same remote-work wave on Office's coattails.

CI changing of the guard: Jenkins is the CI tool of the mid-2010s, then GitHub Actions takes over from 2021 on.

The AI-coding-tool relay: Cursor is the editor everyone talks about in late-2024, Claude Code spikes hard across mid-2025, then OpenAI's Codex takes its turn into early-2026.

The config-management wars: Chef leads the automate-your-servers era ~2011–12, Puppet trades blows through 2013, then Ansible's agentless approach pulls ahead 2014–15.

The functional language HN couldn't stop talking about: Clojure's Lisp-on-the-JVM moment ~2009–11, Haskell's purity debates ~2012, then Elixir rides the Erlang revival 2016–18.

API design, era by era: REST becomes the web's default 2012–15, then the post-REST generation splits: gRPC for service-to-service from 2016, GraphQL for the client from 2017.

Web servers across the decades: Apache rules the 2010–12 conversation, nginx overtakes it for the high-traffic era 2011–13, then Caddy arrives with automatic-HTTPS 2017–22.

The front-end MVC wars: Backbone.js is the first to give the browser structure ~2011, then Ember and Angular escalate to full frameworks 2013–14, the fight that set up React.

A decade of face-computer hype, one tower each: Google Glass in 2013, Oculus with the Facebook deal in 2014, then Apple's Vision Pro in 2024: three spikes, ten years apart.

The full-stack web framework baton: Django and Rails define the 2009–15 'MVC framework' era, trading the spotlight, then Laravel inherits it for the PHP world and surges 2019–21.

The JS build pipeline, three generations: Grunt's task-runner era 2013–14, Gulp's streaming rewrite 2014–15, then Webpack absorbs the whole job as bundling becomes the story from 2016 on.

The 'just deploy it' platform, reinvented each era: Heroku defines push-to-deploy in the early 2010s (and spikes again at its 2022 free-tier sunset), Netlify owns the JAMstack 2018–20, then Vercel takes the Next.js era from 2023.

The NoSQL boom in order: CouchDB rides the early document-store wave ~2009, Cassandra carries the scale-out story 2010–12, then MongoDB becomes the era's default 2011–13.

Browser test automation, three generations: Selenium is the way to drive a browser through the 2010s, Cypress reinvents it for the modern front-end ~2020, then Playwright pulls ahead and surges into 2025–26.

Cross-platform mobile, baton by baton: Xamarin carries the write-once dream ~2016, React Native takes over for the JS crowd 2017–18, then Flutter overtakes both and peaks into 2024.

The hybrid-app lineage, renamed each era: PhoneGap wraps web apps in a native shell ~2011, its open-source successor Cordova carries it 2014–15, then Capacitor inherits the job and spikes in 2024.

The post-Webpack bundler scramble: Parcel's zero-config pitch lands ~2019, esbuild's Go-speed rewrite grabs attention 2021, then Rollup re-enters as the library bundler of choice into 2022.

The observability stack, layer by layer: Prometheus owns metrics collection ~2020, Grafana takes the dashboards spotlight 2021, then Datadog rises as the all-in-one SaaS into 2023.

The cloud data-platform relay: Redshift defines the cloud warehouse ~2017, Databricks rides the lakehouse pitch into 2021, then Snowflake becomes the era's default name by 2024.

Open-weight LLMs, release by release: Llama opens the floodgates in early 2023, Mistral's European challenger surges late 2023, then Qwen carries the open-model crown into 2026.

Voice assistants across the decade: Siri arrives first with the iPhone 4S in 2011, Google Assistant takes a turn ~2018, then Alexa peaks into 2022: three spikes, years apart.

Altcoin generations: Litecoin is bitcoin's silver in the 2013 boom, Dogecoin spikes as the joke-coin of that same era, then Solana carries the next-gen-chain story into 2022.

Crypto's serial manias: the ICO token-sale frenzy peaks in 2017, the NFT gold rush detonates in 2021, then DeFi carries the yield-farming hype into 2022.

Three game engines, one shared earthquake: all three spike together in the Sept-2023 Unity runtime-fee fiasco - Unity's self-inflicted blow-up, with Unreal and Godot surging the same month as developers threatened to jump ship.

The eternal hardware trio: CPU and RAM are the staples HN has argued about since 2007, while GPU climbs out of the pack through the crypto-mining and deep-learning booms.