I thought telomeres just get shortened during replication but not in stem cells or something like that? A while ago since i was in that rabbit hole.

I think my conclusion was, we would have to fix programmed cell death vs. immune system & cancerous behavior, add 4x replication for dna-repair like some algae do it, and fix something in ribosomes (which i forgot).

Then again, we probably don’t have to meddle with programmed cell death at all?