Perfectly, the track is called “Now and Then”:

“Now and Then” has a similar provenance as “Free as a Bird” and “Real Love,” the other two “new” Beatles songs to have been released since 1970: All are rough Lennon home demos recorded during the late 1970s and provided by his wife Yoko Ono in 1994 for the surviving members to complete.

“The Beatles New Song ‘Now and Then’ is a Bittersweet Finale to the Fab Four Blah Blah Blah ‘member Boomer Music? I ‘Member...”, -Variety.com

John Lennon slapped his piano around sometime in the 70’s, Yoko Ono gave the demos to the remaining Fab Three sometime in the 90’s, George Harrison piled some guitar on it before he kicked the bucket, and McCartney and Ringo finally got around to adding their bits. It is now A Thing, because nothing any of the individual Beatles have done in the last fifty years has ever or will ever measure up to their collective work in the previous ten. Because “The Beatles” is a brand name that We All Know, and “Paul McCartney” is a name we know only in connection to “The Beatles”.

So that’s the how and why; the real — unfair — question is whether the song comes close to measuring up to the Beatles or their collective solo works’ towering legacy. Of course it doesn’t, but it’s still an unexpected pleasure that marks the completion of the group’s last bit of unfinished business.

“We are the Beatles, Band of Bands! Look upon our Works, ye mortals, and despair!” -Variety.com

So the song is a big “whatever”, as you would expect something that began in Lennon’s basement and was never intended to be a Beatles song would be, but it has become a Beatles Song, and now we will prostrate ourselves and sing “Strawberry Fields Forever” three times in penance for our sins. Go forth, and be Thoughtfully Excited about this. The good people at Capitol Records thank you.

Sixty years of smelling these guys’ farts, and it’s not ending anytime soon. You have to respect that kind of consistency.