I considered using pijul but everything in Nix/Guix is oriented around git as are the plugins for my text editor and CLI, and there aren't good self-hosted web frontends that I can use to put pijul projects on my linkedin profile or whatever. I want to switch to it but the ecosystem surrounding it needs to actually exist first.
This is actually why I prefer using pijul. I don't want to commit my secrets to a git repo and nix will refuse to build because I'm pulling in files that aren't tracked. Simple solution is to not make the flake directory a git repo and it won't complain. That's my solution at least. I also prefer using git (and therefore pijul) via cli rather than as a text editor integration so my experience differs.
I use git primarily via cli also, the text editor integration (with helix) highlights information such as what lines haven't been committed and makes it easier to access other files in the repo, the fish integration tells me if there's files that haven't been committed or commits that haven't been pushed without having to run git status
I do use helix but haven't taken advantage of the git integration. Maybe I'm unaware of its power.
For fish, I defined my own fish_prompt function with an indicator if there are uncommitted changes. It's just running git status under the hood. I have a TODO in that function to run a pijul diff in the directory if git status returns nothing...
The 1.0 is in beta. There has been a lot of refactoring to get it to this point. I would say there's still many quality-of-life features missing that would stop me from using it in a professional setting but for hobby projects it's meeting my needs (and gets better with each new beta build). They only have a few project backers but the main developer has been working very steadily on it.