Wait a minute:

> Cryopreservation + Demonstrate the ability to cryopreserve and recover live wild-type mice with high viability. Specifically, demonstrate the reversible cryopreservation of live, intact, wild-type adult mice in a whole-body frozen or vitrified state. The mice must remain frozen or vitrified for at least 24 hours, must be recovered with >99% viability, and must not suffer any permanent organ damage or bodily harm. Somatic genetic engineering is discouraged but permitted. All experiments must be conducted with ethics approval.

This has been done in the 50ies, freezing and thawing mice with microwaves. IIRC the recovery rate was about 74% with no observed side effects. The research was given up on because in this specific case a mouse is a bad biological model. Thawing agents must scale cubically with size. The author says that at approximately the size of a cat you can’t quickly enough evaporate all the agent because the energy required will simply burn the tissue.

TLDR: it’s possible, it’s been done, it could be perfected if necessary, it does NOT scale beyond mice