"Why do you think a pair of millionaires like Lennon & McCartney would?"
:lol:
Because rich people want to be even more rich!
Hell, you can argue Lennon sold out a bit in 1980 when he recorded his songs for DOUBLE FANTASY. Pure pop songs with some interesting lyrics. Where was his edge then? You know what I think...Lennon had lost his edge. He'd grown into being a husband and father.
Also, given how the Rolling Stones have "continued," the rivalry between the Stones and Beatles would have added pressure. Had Lennon lived, they would have joined up, at least once, for a big payday. And maybe even they would have done a little art, too.