The Fab Four considered reuniting after their split in 1970, right up until John Lennon's death a decade later.
But McCartney considers it a "blessing" they never made it back into the studio together.
He tells Q magazine, "There was a bit of talk of The Beatles at certain points. What used to happen was three of us would fancy it and then maybe George or John or I wouldn't. In a way it was a blessing. We'd done it, why spoil it? Whether it's God given or not, those four people were a pretty good mix."