Now, I almost never see engineering blog posts or HN posts highlighting use of message queues. I see occasional content related to Kafka, but nothing like the hype that message queues used to have.
What changed? Possible theories I'm aware of:
* Redis tackled most of the use-case, plus caching, so it no longer made sense to pay the operational cost of running a separate message broker. Kafka picked up the really high-scale applications.
* Databases (broadly defined) got a lot better at handling high scale, so system designers moved more of the "transient" application state into the main data stores.
* We collectively realize that message queues-based architectures don't work as well as we hoped, so we build most things in other ways now.
* The technology just got mature enough that it's not exciting to write about, but it's still really widely used.
If people have experience designing or implementing greenfield systems based on message queues, I'd be curious to hear about it. I'd also be interested in understanding any war stories or pain points people have had from using message queues in production systems.