Personal servers.
There are things that need 9^5 and there are things that don't. If someone backs up their application configs and data properly, then the only thing that really matters is a proper backup strategy.
All my critical files are backed up periodically (manually) via rclone to S3 glacier, and all my services are documented in dokuwiki. If you use ansible or want to store configs and installation scripts, a private git repo would do well.
After that, I don't see a problem running rolling or short-support OS like Fedora Server for application hosting.
Great. I like my personal servers to just keep working. Without having to restore backups. And without having to spend one Saturday every month to update and fix all the servers.