Zach Braff wants out, could "Scrubs" continue?

from Ausiello's TV Guide column

Question: I hope you had fun at the Emmys! Anyway, I just read that
Zach Braff doesn't want to do Scrubs anymore and that this is his last
season. They'll have to stop the show if he leaves, right? — Anne
Marie

Ausiello: Wrong! I cornered series creator Bill Lawrence on the red
carpet and asked him point-blank whether Scrubs could go on next
season without the Braffster. His answer floored me. "Yeah, I think
so," he replied. "We'll have to see how we do this year. If we're
doing really well, it'll be hard to stop." OK, but who on god's green

karl...

Much as I like the show I doubt it would survive ZB leaving. Not that he is
indispensable to the show but it's ratings are too marginal to weather such
a change. I bet if any of the major characters left NBC would fold up shop.

David...

Unless their new comedies do well ABC could still be interested.

earth could replace him? "I think that Zach could walk out the door
and a new piece of casting could walk in with a voice-over. Or Zach
could walk out the door and Donald Faison could walk in and his
voice-over could say, "I don't know what I'm going to do without J.D.
around." Donald Faison as the new star of Scrubs!?!? Count me in!
Actually, count me and Donald in. Seconds later, I floated the idea by
Turk's portrayer and he was game. "We'll see what happens, but that
would be nice," he said. "Do I want it to be the last year? Of course
not. I like making money, and I have a great time on the show."