A class "A" example of this is Enhanced Recordings. Just look back at their discography, even all the way through 2010, they had nothing but bangers. But now? One big-room track after another, and the change didn't happen gradually but rather: BOOM, BIG-ROOM FROM HERE ON OUT!
Blame it on Tritonal taking over the label.
I instantly found myself unfollowing them on every channel back then. Even their artists radically changed their sound: Juventa, Estiva, Stonevalley etc.