As someone unfamiliar with React, does it or its ecosystem change so frequently that you need to stay on top of it? That sounds a bit worrying, or I'm just taking it out of context.
Staying up-to-date with the changes to the core of React is definitely possible without CatchUp. It's how the community is using it (patterns, best practices, etc) and the open-source library changes that are hard to keep up with especially because there are so many sources where you need to check (twitter/newsletters/youtube/medium/etc)
