The JavaScript ecosystem changes very fast. How do you keep up without chasing every new framework?

Answer with a filter, not a reading list. Anyone can name newsletters; the interesting part is how you decide what to ignore.

What to keep up with: the language and the platform. New syntax that reaches Stage 4, changes to the event loop and module semantics, and browser APIs that remove a dependency you were carrying. These are durable — they will still matter in ten years.

What to watch but not adopt: frameworks and build tools. Learn what problem each new one claims to solve, and wait until it has survived a couple of major versions and a real production story before putting it in front of users.

How to actually learn: build something small and deliberately awkward with it. Reading a tutorial teaches you the happy path; the value is in the second day, when you hit the thing the tutorial skipped.

Note: Being able to say "I evaluated X and chose not to use it, because Y" is the strongest possible answer here.