Comment by thesephist

Having built some SPA's, I'd argue that at least those two things that you mentioned are the fault of whoever built bad SPA's, rather than issues with SPA's as a whole. It's possible to build an SPA that works well with the browser controls because modern browsers expose a lot of their functionality to JavaScript (like it or not). You can use <a> tags for buttons and links in an SPA (and keep the link functionality) -- you can just intercept the clicks when the link is being opened in the current tab, and you can always hook onto pushState/popState to make the back/forward button work.