> I don't think people realize that you can go back to a website after you've visited.

This is about as wrong as you can possibly get.

This would be true in a stateless world (assuming you can remember the site you want to visit).

Which the web hasn't been since a very long time.

Can you give me a concrete example? I close windows and tabs with ruthless abandon.

Unless you have a web app which is entirely local and doesn't save its state to local storage, what could you possibly be doing that requires a tab to remain in residence?