One showstopper for me is that Jujutsu doesn’t support .gitattributes (https://jj-vcs.github.io/jj/latest/git-compatibility/).
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CRLF autoconversions especially shouldn't have been supported, imho. Git on Windows's default setup still converts LF to CRLF to this day, even though every program on Windows has understood LF for a number of years.