I read all of this and see that we have a fundamentally different view of Mitchell. For me, he is a safe starter and a great one. A great defender and a prototype of a modern center. If he also had a three-pointer, he would be one of the most desirable centers in the league.
I certainly wouldn't say he's "injury prone". Yes, these two injuries don’t look nice in a short period of time, but these are classic fractures and it’s just a bad luck. If it was a knee, back or something like that, it would be a different matter. Also, Mitchell has not yet fully developed his potential, which he would surely succeed with Thibs.
And some here are already writing there are "several players in the draft who could replace him". Not to mention some people think that he is not worth more than 10 million per season ...
Either way, Mitchell will be RFA this summer or UFA next and I think some here will be surprised by the offers of other teams. As I’ve written before, I honestly don’t believe the FO will take the risk and let him be a UFA even though who knows, maybe this injury will change some plans as well.