There is no chance for graceful aging with this one. As the street punk playing basketball has always been about "respect" for him. Coming off the bench behind a less accomplished player = therefore a diss and his massively inflated ego is never going to be able to stand it. And I'm not sure whether the Grizzlies danced around this issue with him before he signed with them out of desperation, or whether A.I. actually agreed to possibly coming off the bench before signing, but the ego revolted once he actually saw it was going to happen, but either way I think he had basically no other suitors even willing to promise him that much. He is the classic star who looks like he's going to go straight from stardom right into complete uselessness once his star power fades. Not because he's not still better than half the league, but because he will never accept the role his declining skills demand.
Over the summer apparently some European teams wanted him -- hard to imagine as he represents the antithesis of everything European ball is normally about. But I could see that as maybe his only option here pretty quickly.