If it’s the annual anniversary of the Beatles appearing on “The Ed Sullivan Show,” it must be time to break out Ye Olde Screed about what transpired 50 years after that epochal moment in history. This piece was written in the post-mortem morning, after the Grammy Award-giving people booked a bunch of glitzy guests to ostensibly pay reverential tribute to the group — but whose own music, individually and collectively, had no traces whatsoever of the lasting influence or musical impact left by the Fab Four (exceptions to this rule were Stevie Wonder and Annie Lennox, both of whom were splendid in their own right). Meanwhile, the sidebar to the whole affair that grabbed center stage (as a subject of both the show and my subsequent essay) was an inevitable appearance by that photo/stage-bombing Zelig of Rock, ex-Nirvana drummer-turned Foo Fighters frontman Dave Grohl, who comported himself with a space-hogging zest designed to show us, once and for all, that there was something way more powerful, even, than a prodigiously gifted group of musicians or a once-in-a-lifetime musical phenomenon: a really well-connected ex-grungester with unlimited access and zero boundaries.