What Would Be the Opposite of "Jumping the Shark"?

Maybe there’s something from Happy Days itself? “Fixing the Jukebox”?

Happy Days hit is stride when Chuck disappeared for good. About the same time Fonzie went from a denim jacket to a leather jacket.

We could call it something like “Up Chucking”. No, I guess that does not work. “Went to Leather” or “Chuckless”?

“Eligible for Syndication”?