Just added jj support to my package manager ( https://github.com/alexpdp7/ubpkg ).
It took me a long time to finally switch from Subversion to Git. But once I did, I never looked back. It will likely take me another very long time to switch to jj, but installing it is a first step :-p
I have some doubts about jj's governance, but I'm crossing my fingers the situation improves.