Maturing is realizing that js is an actually good language. First of all, you can't avoid it. The whole web frontend runs on it, a huge share of the desktop applications use it(unfortunately, but there is no simpler option), and a huge part of the web backend uses it. It's also used in almost any other usecase you can think of. Just look at what some of your favourite foss projects are written with. A lot of them are js/ts.
That's because it gets the job done. If we could have replaced it with something else, we would have. Dont think that big tech would sacrifice a single penny just because they like js. They would replace it to prevent future costs. It has some decent functional programming abilities (not great, but ok) so if you write it correctly and not try to cram OOP into it, you can create some pretty robust software with it. Although something that is meant for FP is better, like Clojure.
JS is going to outlive some of us. Maybe all of us, wether we like it or not. I think everyone should know at least some degree of JS because it is so useful.
[Sorry for not blindly shitting on js and shilling Rust or smth]
This is very incomplete. Like to see it become more complete.
Clojurescript and purescript are my favourites.