that Matt went along with 100%. He has left the show (on his own, not being fired) so many times before he may have figured he just didn’t want to come back anymore.
I know he’s done a lot of work in community theater and he may want to continue in that, although I don’t think there’s much money there. Or, who knows, he may have something else he’s doing that he wants to stick with.
I really don’t think they’d kill Jack off unless Matt was totally agreeable with it. Besides, we all know nobody stays dead in Salem anyway.