my leaker knows ball coz i was thinking this too during this part of the livestream
the stream also mentioned likening cryo to preservation. this concept, however, is not new to hoyo at all. in fact, this concept has been done in genshin in a quest in mondstadt where diona's several generations old relative got encased in ice and was only recently thawed. he didnt age at all in that ice.
so with all that said, isn't one of the oldest theories we've got for kaeya the idea where he was "frozen in time"? he had to be "preserved" to awaken him at a better time to serve as khaenri'ah's "only hope"
(also someone jokingly said in the replies that "kaeya is nibelung's reincarnation"
you jest but i legit had a lengthy theory post on that, and im somehow still betting on it even though its probably nothing now lmao)















