"Vitrification" goes a long way towards addressing the specific problem of ice formation. Very rapid cooling is unnecessary. The downside is that you currently

"Vitrification" goes a long way towards addressing the specific problem of ice formation. Very rapid cooling is unnecessary. The downside is that you currently have to have your body removed prior to neuropreservation. I don't discount the other serious challenges of cryonics, like fracturing and cryoprotectant toxicity.