You've already invested a huge amount of time in learning something which became obsolete (like jQuery), then you got over it instead of giving up in frustration, and spent a huge amount of time learning something else (like Angular or React), and you've finally come to grips with the fact that it too will eventually become obsolete, and you'll be fine moving on to the next thing (like Svelte).

If you only know one system and think you're going to be able use it forever, then you're still a junior developer. If you're afraid to move on and learn something new, then you shouldn't be a developer at all.