I'm playing around with it. I self-hosted the Tranquil PDS (personal data server, part of AT Proto), a knot (git repositories), and a spindle (CI runner) on my home server. It was all relatively easy to set up but even in the week that I was bringing it up I found bugs and then saw those bugs get fixed so they're earning the "alpha" badge on their website. I'm not using it for anything load bearing yet but I like the idea at a high-level, though it remains to be seen how well code hosting fits into the AT Proto model.
https://tangled.org/tranquil.farm/tranquil-pds
https://docs.tangled.org/knot-self-hosting-guide
https://docs.tangled.org/spindles#self-hosting-guide
edit: TIL HN doesn't support markdown, why does this surprise me every time.