Aside from cost there's also the issue of law, requiring people die of natural causes beforehand means most people will turn to soup before their brain can have any hope of being preserved.

I have cynicism for lots of things involved here, but if I had the option from some shady person who seems like they are capable and vaguely aligned with me I'd probably take the chance especially if we could make some sort of a post-revival agreement. What a brain (put into a small machine and ideally alongside symbiotic systems) can do for the people who are still alive. Probably with my brain in a jar living in VR until the details are worked out.

And if it doesn't work out that way, well... That's gooood soup!