The Utah Jazz have not backed off their stance that Lauri Markkanen isn't going anywhere this season. If they live up to the expectation of being one of the worst NBA teams, Markkanen's place on the team will only get questioned more and more as time passes. Bill Simmons explained that keeping him on the team would only serve to hurt their chances of getting the best lottery outcome.
"Why is he still on Utah?" Simmons asked. "... All he's going to do is hurt them as they try to get another high pick.
After his EuroBasket performance, Markkanen looks primed to return to form this coming season, which, if he does, could pose as a problem for Utah, as their offseason moves have signaled that they every intention of focusing on both acquiring and developing young talent above everything else. Markkanen could get in the way of that.
While Markkanen has been a riveting story in Utah, it is becoming clear that he does not fit with their timeline. Utah may think that they can simply keep him around while they try to find the best young talent to complement him long-term, but there's no telling how long that will take, and if he returns to All-Star form, that could hinder Utah's potential to add a future cornerstone.
Utah is definitely aware of this (potential) problem
No one's arguing against the notion that it would make sense for the Jazz to trade Markkanen as he's in his prime playing for one of the youngest NBA teams. However, the reason why Utah is willing to take a risk like this is because the West is just that good and the Jazz will be just that bad that they can live with Markkanen returning to form and still get a golden lottery pick anyway.
That is their current perfect scenario of having their cake and eating it this season. The Jazz won't tank forever, and if and when they decide that they want to win (which won't be this season, pending any surprises), Markkanen's contract is long enough that he'll be there when they start playing for real.
That's not to suppress any of Simmons' concerns because it's very possible Markkanen looking like his normal self could make the Jazz better than they currently want to be, like it has in the past. Utah's mindset is clearly, "We'll cross that bridge when we come to it," so the only way to know if Markkanen will stay in Utah's long-term plans will be seeing how the team fares with him.