It's too different. At best you could make it an off-by-default mode.

And I'm sure there are some people who actually prefer Sapling or raw git.

personally, I am not interested in learning bunch of new interfaces to be - maybe - marginally more efficient

and deal with more abstractions layers if anything goes wrong

> It’s clear from multiple posts over years that jj has a better UX than plain git.

it is clear that multiple people like it

not that UX is strictly superior