I am really curious about data proving these.
I am not aware of any benchmarks proving or disproving.
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.
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?