Nurkic is a much better fit around Dame and CJ than LMA at this point could be, there's no sense to that trade. Forget about the age difference and potential, and the fact that LMA is half washed - Nurkic is a much better and more consistent defender, especially against young guards and PnR action where Aldrige gets cooked; he's a much more active rebounder and more modern scorer that doesn't need "touches" and pounding the post to score. LaMarcus does not move the needle for the current iteration of the Blazers (and seeing the trade they've made to shed luxury salary recently, they're probably punting this season anyways and looking at the draft). Just no chance of the trade going through, especially since Nurkic is a fan favorite and is rehabbing an injury, it'd be a pretty bad look to trade him now for the Blazers.
I absolutely wish it would happen though, even though we'd probably have to give up a pick or two. Nurkic would plug a lot of holes for our current roster.