Are people really struggling at that level, though? It has never been easier to write a complex page with minimal Javascript - there are more and more HTML elements that do what you expect (expandos and modals as some recent examples), Javascript is cleaner and more consistent across browsers (you really don't need jQuery anymore), and CSS is more powerful but also so much simpler (flex+grid solve so many problems).

Then if that's not enough, you've got things like HTMX if you're keen on doing everything in terms of html templating, you've got tools like Svelte if you want an isolated chunk of dynamic UI in a mostly static page, you've got bundlers like Vite that just work without any configuration if you get to the point where you need a build step, and you've got a multitude of lightweight frameworks for the next step.

And on top of that, pretty much all the old ways still work. The browser is an incredibly stable environment! Outside of a handful of security-related removals, if it got into a mainstream browser, without a feature flag or an explicit "experimental" warning, it's pretty much there for life. So if you want to go back to the old ways, there's not much stopping you - but a whole bunch of quality-of-life development improvements along the way to make things even easier than they were back then.