Quitcherbitching, do your thing, don’t disolve and just get together ever so often and pump out some righteous tunes.
That’s my after 1970 advice. Other than that, I’d concur on the Apple debacle.
And Magical Mystery Tour? Dudes, fine drop acid for two solid years, but stay off the buses and stay in the studios.
And more touring would have been cool too. I realize Beatlemania sucked for them, but once they moved out of pop and into cool, they would have been great in concert. Especially in the 70’s when concert technology started to catch up to their concepts.