Commentary - The Beatles Now: "It is, I suspect, no accident that after 1970, none of the four Beatles would write any songs or make any recordings comparable in quality to the ones they made as a group. Together, their musical limitations had been offset by the creative synergy of their collaboration (as well as by the discreet guidance of George Martin, their producer-mentor). When they began to work independently, the limitations overwhelmed them, and they spent the rest of their lives struggling in vain to rival the achievements of their youth."
I don't know about you, but I could make an awesome 5 CD boxed set of post-breakup Beatles songs and each one would be comparable in quality to songs in the Beatles' work. I also don't think their "musical limitations" (!) got the better of them individually. If anything, the LACK of limitation meant that a number of lesser material made its way into their work that otherwise would not have. And isn't it unfair to compare the Beatles individually to The Beatles as a group? Let's compare them to everyone else and they stand up quite respectably as individuals.