If Apple is indeed working on a two panel foldable, where the screens come together to create what looks like a single screen, they’ll have solved the biggest negative that every other foldable has - the plastic covered screen. I recognize that there are a lot of people, especially tech followers, who are too young to realize that early portable tech devices started out with plastic covered screens that all suffered the same fate - scratched screens that lasted barely a year.
There is no way the broad consumer base that Apple has would accept, after 10+ years of glass screens, a soft and scratch-prone plastic screened iPhone (or iPad or MBP, etc.).