They had a golden opportunity last year, and it's hard to see the situation trending anywhere but downward.
Last we checked, the Utah Jazz's current mindset on Lauri Markkanen is that he will be on their next playoff team, no matter how long it takes. While it's clear that the Jazz don't want to give up on Markkanen, what's also been clear is that, given their current situation, they probably regret how they've handled this situation, to the extent that not trading him is their biggest recent regret.