Yes but at small scale. Myself and a handful of others from our Discord run it in production. The core build/push/deploy workflows are stable and most of the heavy lifting at runtime is done by battle-tested projects: Docker, Caddy, WireGuard, Corrosion from Fly.io.
Radboud University recently announced they're rolling it out for managing containers across the faculty which is the most "serious install" I know about, but there could be other: https://cncz.science.ru.nl/en/news/2026-04-15_uncloud/
TBF, the documentation says you can download and review the script, then run it. Or use other methods like a homebrew or (unofficial) Debian package, or you can just install the binary where you want it, which is all the install.sh script (107 lines, 407 words) does.