So the suggested solution for more secure email is just to give up on the concept of email entirely? Anything that does not do perfect forward secrecy is just pointless so there is no point in trying to keep significant discussions to refer to later. We are expected to return to a sort of virtual pre-writing stage.

This is not really helpful. For all its shortcomings, PGP is pretty much all we have. If used in a straightforward way it actually can protect email from nation state level actors for a significant time. That's gotta count for something.