My new theory on revived frozen embryos. Reddit/cryonics pointed to frozen embryos, which got me thinking again on this...
https://www.reddit.com/r/cryonics/comments/y1rl1y/til_that_frozen_embryos_show_no_significant/

Frozen embryos certain can be revived. Why is this not translatable to cryonics? I'm not sure yet other than the standard argument that there are not as many cells. I'll have to look into this a little bit soon.