Oasis fans apparently have straws to thank for Noel and Liam sounding as good as they have on this tour

[ProfessorGAC]

8. It's Not Just The Music

It was the way the Beatles leveraged that popularity to be allowed to call their own shots.
No record company exec would have greenlighted Sgt. Pepper. No exec would have approved of a classical trumpet solo on Lenny Lane; a string quartet on Elanor Rigby.
They forced the record company to accept whatever it is they decided to do.
That was a monumental industry change.
And, to use your example, the other Merseybeat bands didn't have the musical range the Beatles could exploit.
Four guys, four singers, 3 guitarists, 2 bass players & 2 guys that could play piano.
That was potential those other Mersey bands did not have.
Finally, the Beatles did not sit on their laurels when they were the biggest thing on earth.
They willingly & willfully went away from the formula that got them there. Not sure how many 60s acts could have, then would have done that.