Good comments, Rich.
Btw, of my fellow Boomers here who remember that night on the Sullivan Show, after the Lads performed, how many of your parents said somethin' like, "Well, we'll probably never hear of these kids again in a year or two!"

I know MY Dad said somthin' like that at the time.
(...though what's kind of funny is that about five short years later, I remember a time while riding in the back seat of my Dad's Caddy, "Ticket To Ride" came on the radio and both Mom AND Dad seated up front started singin' to it)