Post

TIL that post-LUCA (last universal common ancestor) horizontal gene transfer might be one reason for the current universal conformity of the central cell mechanisms.

this is actual a vast open source eco system! there may have been different bacterial groups using different codon systems. but if you're sharing protein sequences, and your code is different, you'll build garbage. you get left behind and die out. *that*'s the reason everybody has the same code.