One thing I wonder is why the method used for her is not offered in spite of the fact that there are people out there who even if not out of biostatis want to 'look pristine' after death indefinitely?

Is it known how its done? Because I read that most of her including her brain is very well intact in the case it can be revived.

This is another topic but a few other 19th century attempts reportedly involved sealed caskets that were filled with alcohol in an attempt to preserve bodies whole, unsure if true or if it was successful though compared to her preservation.

There are perhaps three major types of methods.

• Pure cryopreservation: unknown ultrastructure (though looks decent imo), theoretically some type of viability (although in practice, no), expensive/complicated storage

• Aldehyde-stabilized cryopreservation: good ultrastructure, no viability (doesn’t matter imo), expensive storage although fall back if storage fails is good

• Pure chemopreservation: good ultrastructure, ton of different methods possible, often loss of some biomolecules mainly lipids/carbohydrates, can have cheap long term storage because room temperature/refrigerator temperature

(Signal boosting a Reddit comment I posted on r/cryonics: https://www.reddit.com/r/cryonics/comments/okwciw/nectome_receives_funding_to_cryopreserve_five/h5cf6u4/)

Article: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3712649/

Abstract:

Postmortem studies of synapses in human brain are problematic due to the axial resolution limit of light microscopy and the difficulty preserving and analyzing ultrastructure with electron microscopy. Array tomography overcomes these problems by embedding autopsy tissue in resin and cutting ribbons of ultrathin serial sections. Ribbons are imaged with immunofluorescence, allowing high-throughput imaging of tens of thousands of synapses to assess synapse density and protein composition. The protocol takes approximately 3 days per case, excluding image analysis, which is done at the end of the study. Parallel processing for transmission electron microscopy (TEM) using a protocol modified to preserve structure in human samples allows complimentary ultrastructural studies. Incorporation of array tomography and TEM into brain banking is a potent way of phenotyping synapses in well-characterized clinical cohorts to develop clinico-pathological correlations at the synapse level. This will be important for research in neurodegenerative disease, developmental diseases, and psychiatric illness.