Plus, there are a lot of people writing JS. It’s not a tiny community fracturing itself over different ways of doing things, and becoming destined for obscurity. It’s tens or hundreds of thousands of developers. In a community this big I’d say having a few choices is a sign of health.
Python is 30. Django is 16.
I’m just picking a few frameworks and languages I’ve used in the past and are still used. Obviously there are still new frameworks and libraries that come out for these languages. But sometimes the big projects fold those in. Or they write their own or whatever. I can pick the popular names and do pretty much what I need.
JavaScript is 25. But most of that time we weren’t doing what we can now. And most frameworks are fairly young. Angular is 11. But most people (and jobs) have jumped ship to React(8) and now there is Svelte(4) which also looks good. And I think there will be more changes to come.
These JS frameworks aren’t exactly veterans that are impossible to supplant. Not yet anyway.
It’s not just front end developers though. I think other domains and their frameworks went through the same thing. This is just the time for front end.