Happy days continued without Richie and A different World went on and on with out Lisa Bonnet... And of course there was Babylon 5 Losing O'hare and Blakes Seven continued for two seasons after Blake "died", and Doherty leaving Beverly Hills 90210, Charmed and Scare tactics all worked out for the best, and the shit they pulled in earth Final conflict... Although replacing the Dukes didn't work out too well, but they did replace Superboys in the series running before Lois and Clark without anyone noticing... Did Sam really ever recover from Diane just vanishing between seasons? The two hundredth episode of Cheers was the cast on folding chairs in front of a live audience with clips. Shelly just appeared with out being invited by the TPTB and sat down with the rest of the cast and no one said anything about what the hell she was doing there.
Welling should leave and Smallville should be about Smallville.
Surely after 8 years there must be a rich tapesty still worth plumbing?
Welling ought be Superman by now.