I have switched to pure HTML/CSS/Javascript for frontend. And I am very happy with it. I sometimes use external libraries. For example handlebars if I want to template something clientside. But no more frameworks. I think pure Javascript is plenty enough these days. For those who can't live without a framework: What would you miss?
It’s pretty innovative in that it’s not really big JS bundle, but more of a compiler for what is essentially quite vanilla JS code. In the end, if you use Svelte, then your final product will be pure HTML/CSS/JS.
I love it because it lets me bundle logically related markup, styling, AND javascript in the same .svelte file. Plus, it’s blazing fast.