Actions, GitHub apps/external integrations, identity/permission management
The most significant, near-term, non-moaty gap is still private repos, which isn't all that big of a feature on the surface, but will have major work under the surface because of how bluesky is designing private spaces.
I also think being primarily nix/jj focussed turns a lot of people away. Those techs are not my cup of tea, so I don't see myself using tangled.
I'd be curious to hear tangled's thoughts on the path to financial sustainability. Without something that sounds plausible, I'm unwilling to migrate my code forge, for risk of going away / obsolescence.
Nix is as simple as it gets, even better than docker. Just 'nix run' whatever flake file someone gives you and everything works magically.
This codeforge going away can't happen for me because I self-host it.