I agree I think one of the main things I learned from all this was that I should probably buy / set up a real NAS. I’ll look into zfs pool thanks for the comment!
There is a straight up data loss bug in 2.4.3 (zeroed out files, totally silent).
https://github.com/openzfs/zfs/issues/18366
This caused all sorts of grief at day job where dedupe was useful for a big cache. Conversely I've run ZFS at home for like 15 years at this point without trouble. But this one is an absolute nightmare.