Humans are particularly difficult to preserve because of the delicate structure in (most of) our heads.

Nonsense. We are just too big to be frozen quickly enough that no ice crystals emerge. Every living thing turns to slush if frozen normally.

That was a (pardon the pun) cool read, if a bit morbid.

Nelson and the mortician then spent the entire night figuring out how to jam four people — who may or may not have suffered thaw damage — into the capsule. The arrangement of bodies in different orientations was described as a “puzzle.” After finding an arrangement that worked, the resealed capsule was lowered into an underground vault at the cemetery. Nelson claimed to have refilled it sporadically for about a year before he stopped receiving money from the relatives. After a while, he let the bodies thaw out inside the capsule and left the whole thing festering in his vault.

Grooooooooosssssss

Ever seen DMSO solidify upon cooling? I wouldn't even call it vitrification, it obviously has macroscopically large crystalline domains. It would be like putting rocks in your veins. I mean it kind of works fine for single cells because the failures* can be treated as a statistic, but anything on the scale of organs will become damaged just too badly.

* See e.g. what happens to frozen sperm cells: "chromatin disruption through protamine translocations, DNA fragmentation, and lesions to genes involved in fertilization capability and embryonic development [...] are known consequences of the cryopreservation process."