I, too, am extremely interested in development on Tangled, but I miss two features from GitHub - universal search and Releases. the web frontend of Tangled is so fast that I am still getting used to the speed, and jj-first features like stacked PRs are just awesome. kinda reminds me of how Linux patch submitting works.
It's fast because it lacks features
I'm more interested in gerrit/git-codereview for stacked commits than jj. A couple extra commands for new folks, not a completely new tool and lexicon