I wish the back button would bring back the rendered view of a page from a cache so that it would be (a) instant, and (b) not make any network requests.
It seemed to me that older versions of the Opera browser did this, and the text-based "links" browser seems to do this today.
I'm confused - my browser does exactly that, and so do others' around me.
I've even had an issue on a project recently caused exactly by the rendered view being saved for the back button. I've also had to demonstrate a possible issue with full page loaders on a regular website twice for the same back button reason - because apparently people (or at least several of my colleagues) don't find browsers' native request loading indication enough anymore... Rotten by JS loaders and SPA's, I guess?