As someone who has been doing frontend dev since "AJAX" was the hot new stuff...
I am deeply, deeply disappointed in the field. It simultaneously has an extremely high rate of churn and an extremely low rate of actual innovation.
After observing the discipline for nearly two decades, I am concluding that almost all the "progress" really starts to look like we're just rearranging the furniture endlessly without substantive improvements in developer velocity or end user experience.
Any given "progress" looks reasonable for a moment but is ultimately circular. We've been playing rock/paper/scissors with "better" techniques for a long time now.
Things have been stable for a while now. We haven't had actual churn in years.
But given that there has not actually been progress either, my guess is that this is a temporary situation.
Either way, Svelte is one of those things that promise some real progress. Not one of the things that have the same amount of problems, but in a different configuration.