I think from the comments here: probably? I don't know anything about Svelte, so I can't really say, but you're the third person I've seen say "this sounds like Svelte", so I'm inclined to think you're all right :)

So has it taken off / is it taking off? If not, why not? Or more to the point of my original comment: Why is something like this just now taking off? Has something new enabled this in the last few years?

It's not a new idea was my point in my comment, so I'm curious why the idea never seemed to take off in the past, and why it might be poised to now.

I can't understand how Svelte is not more popular. From first time I saw it 4y ago I thought it was game changer, did not change opinion.