Well, there's 'makes provably incorrect claims' crazy, and there's 'requires the invention of Wonderflonium' crazy. To the extent that I think cryonics is crazy at all, I think it's the second sort of crazy. It has a tendency to use arguments of the form: 'this requires technology that we don't know how to make yet. But 100 years ago, we didn't know how to make an iPhone (on many, many, levels). So in 100 years, we may know how to make the technolgy we need.' It's much harder to argue against that sort of crazy, which is what I was trying to get at with my 'not even wrong' and 'to get from X to Y requires [tech]' reply yesterday, although I should probably have used 'Wonderflonium' rather than 'magic pixie dust'.

That said, I don't think cryonics is crazy enough that you shouldn't try it if you think the Wonderflonium is plausible, or, at least, not totally impossible. I have other reasons for not wanting to extend my life which most certainly don't apply to you. The image of you and ajva waking up together in the future in the way you talk about above is certainly an appealing one, and I hope it comes to pass.