This has been a popular idea for some time.
I first encountered it in the ’70’s when critic Robert Hilburn suggested in the LA Times that although they’d broken up, you could assemble virtual albums from their solo work.
This can be done for every year they all made albums.
The first possibility is most interesting to me.
Almost all of these songs, except for the selections from “Plastic Ono Band” (which include Ringo), were at least written while they were still a band, if not rehearsed during “Let It Be”.
It’s clear they were all moving in different directions, but that was also apparent on “The White Album”.