Boban is a lazy comp for Tacko.
Boban actually has tremendous scoring instincts and touch. But his total inability to defend relegates him to a small bench role despite his efficiency. Cousins is having a similar problem with GS - he’s fitting in just fine on offense but his defensive limitations have GS wondering how much they can play him in the playoffs.
Tacko isn’t nearly as hopeless on defense, but he nonetheless won’t be able to defend on the perimeter in the NBA. Any team with the ability to play five out (in the modern NBA, that’s almost everybody) will expose him. And unlike Boban, he does not possess standout offensive capabilities to keep him in a rotation. He actually does have decent hands for his size, but he has little touch aside from dunks.
I think somebody will take a flier on his size and spend a second rounder on him if his medicals check out, but I don’t think he’ll do much in the NBA.