My entire homelab env is written in “pure bash”. Bare metal deployments, creation, build, deployment, update, and backup, of docker containers (which are also just convenience wrappers around other pure bash projects of mine.). Etc…
I do it because I got sick of losing data, work, workflow or convenience to black boxes I didn’t create myself. Hell, even with my third party projects like Plex I have a lot of bash automation around extracting playlists from the internal sqlite db, etc. It really shifts your perspective on what’s possible when you build things by hand yourself.