[dorgo]

No. Blame browsers for not being user-agents any more. Browsers can cache websites, but only if websites tell them to do so. Users are never asked ( there is no setting ). And since websites usually don't want to be cached (for too long) browsers have to reload them ( which takes time ). Thats the reason Back-buttons are slow. Thats ( one of ) the reason(s) everybody has 100+ tabs open.

SPAs and infinite scroll are (maybe) bad, but not the cause of this problem.

[iggldiggl]

Some infinite scroll-type pages consume ridiculous amounts of memory the further you scroll (and if the page disallows direct navigation to a point in history and you need to find something older that you didn't save a direct link for, you've got no choice but to scroll, and scroll, and scroll…), so limitless caching isn't quite the right answer, either…