I’m not aware of any web server that’s still maintained and has wide adoption (so no web servers written by a teenager in Haskell to just fuck around and figure out how web servers work) that doesn’t support the ACME protocol. I highly doubt Manjaro doesn’t use something mainline like nginx.
The renew failing should’ve sent someone a warning that manual intervention is required. This happens from time to time but the fact this went longer than a few minutes unfortunately says a lot about the project.
I don’t know any self respecting sysadmin that doesn’t block P2P in their network. Most enterprise nowadays don’t even require any fancy set up, it’s a toggle switch away. I don’t buy the “oopsie we didn’t know” excuse. They were permitted to torrent by design.