BTW, one big problem for a rich old guy is, it's very likely that their head is the weakest link, not the body. If the body has cancer which has metastasized, the head is not very useful. If the body has some other problem, it could probably be better solved by transplanting a single organ. And most of all, a rich guy who had all the means to care for his body is very likely to have preserved it in a nice shape but his memory is failing them, etc. etc. An old brain in a new body doesn't sound that great, really, not as a means for life extension. "Just for fun" might interest some generally healthy aging people, on the other hand; these people would be heavily stigmatized though, in all likelihood, even if they managed to get the body and were willing to take all the risks.

I think it could be very useful in rare cases is the upshot.