Condensed matter physics is unlikely to contribute anything to the problems and projects you're working on as well, but that doesn't mean it isn't useful or that we shouldn't be studying it. Whether it's something that you're interested in is an entirely separate question. Regardless, shallow dismissals are against the guidelines here, so we don't want to hear about it if you're not interested.

Nobody cares about your problems, nobody cares if you learn a new language or not. The thread is about reflections on using rust - if you don't want to learn/use it fine, but being irritated that others are is just strange.

If they contribute ZERO to the problems and projects you are working on, why would you want to know which one "won"—it will still contribute ZERO to you.