Z is good for about 8-10 games and then he tails off. Also, injuries. You kind of wonder if he's going to get a character-concerns rep after GB and MIN, but some team will give him 10M easy for 8-10 games of about a sack per game and then a disappearing act.
Pass rushers are always at a premium.

If MIN says they want to keep him that makes patching up that relationship interesting.