The solution to bad url routing in SPAs is distributing our work across a madcap wild ass front-end/back-end split with ill defined borders & no protocols? What's happening now is 500% more complicated.

But the magic is well packaged & available by default.

The SSR world has frameworks: but as another commenter pointed out, React stopped at being merely a library. And so it's been anarchy, deciding how to SPA, with many folks not realizing how many needs/libraries they really needed to have.

I'm hugely in favor of SPAs, but there's been a lack of well-integrated sensible approaches. The attempt to identify & only solve a narrow window of concerns has hurt our ability to imagine what apps are, left huge voids all over.