My sole gripe is that, IIRC, it's really tied into a dependency on Systemd, so I can't use it on any of my current machines which run elogind-based distros like GuixSD or a typical Gentoo installation. I don't happen to have any systemd-based distros installed atm, and if I did, can't imagine I'd use Cockpit regularly unless I could use it everywhere-- but I do wish I could! Maybe the systemd functionality can be factored out and re-implemented, but I'm not sure if anyone's going to decide it's worth their time and effort.
[1]: I did have to set $TERM=linux for the web-shell to behave correctly, but am not convinced that's an issue with Cockpit itself.
[2]: https://cockpit-project.org/applications
[3]: https://github.com/optimans/cockpit-zfs-manager/commit/80190...