He’s got like 2 years tops of perfect health but those will be 2 dominant years.
Unless he suffers a freak injury that completely derails his career, he'll last a lot longer than that.
I think folks are too hung up on his actual size, that they think because of all the players who've been that big haven't had lasting careers, he too will be the same. But I don't think you can necessarily put him under that umbrella. Not yet anyway. He's a legit athlete and not just someone who's tall and been forced to hoop. His moms was a pro baller who went into coaching, and his pops was a competitive long jumper who also went into coaching.
He's had all the foundational learning of how to use and treat his body properly from a young age.
It's why despite his size, he doesn't move awkwardly.
If you digitally shrunk him down to the size of a wing, you wouldn't blink twice at how he moves on the floor.