Hacker News users are discussing GetStack.dev, a new tool for tracking open-source GitHub trends, tech adoption, and repository stacks. The creator, h1fra, built it while recovering from a broken leg, aiming to provide data-driven insights into technology adoption. Feedback is mixed. One user reported newsletter subscription issues. Concerns were raised about the categorization of technologies (e.g., Angular and Deno are not languages), and the inclusion of closed-source commercial entities in "open source" trends. Another user reported that a major repository written in Kotlin was missing from the database. Some users are also questioning the way "trends" are presented, suggesting that showing the number of active repositories within a specified time range would be more informative than cumulative totals. Several users praised the idea overall.