That band was “Triumph”, right? 
Quite the contrary!
Eagles is an excellent example, since they had Bernie Leadon, Jack Tempchkin, and Randy Meisner taking turns and later stole Timothy B Schmidt from the Coral Reefer Band and Joe from The James Gang.
For that matter, it’s interesting to see the revolving line-ups of *Santana *or Deep Purple as various experts added their influences and then split off to form other bands and then came back.
Deep Purple begat *Rainbow *which spun out *Dio *which led to…?
*Santana *gave a break to Schon who split and formed *Golden Gate Rhythm Section *which became *Journey *which lost Greg Rollie and pulled Jonathan Cain from The Babys, forcing John Waite to go solo but then they reunited with him as Bad English while pulling Dean Castronovo from *Hardline *and later Schon and Rollie joined back with Carlos Santana to experiment with Abraxis Pool and…
And *YES *has their own double-convoluted history of unions and reunions and so on…
In other words, it happens all the time.
–G!
And Triumph was solid for a minute.
I’ve often thought about Paul and John trading Linda and Yoko (as performers, not lovers). I think it’d have been a wash though.