@roland @djsumdog @mk It's not like the RDB or anything, semantics change, the APIs that extensions use change. There are plenty of community-developed scripts for simple upgrades of small clusters. FSE (not "enterprise") is 611GB on disk. When I did the upgrade to 16.2, it took a while: these upgrades have to be done deliberately. It's not quite as bad as Python 2 to Python 3 but it's closer to that than updating to a new version of some random application. The closer you get to the base levels of the system, the more careful you have to be, and for most uses of a database (the uses for which Postgres is designed), data loss and downtime are unacceptable, some query that was fast suddenly gets slow, you can't have that. And how do you even do that across distros? Maybe his distro should provide that script; Debian does if I recall correctly, but he's shoving everything into Docker containers, and Docker containers tend to offload the heavy storage stuff until they can't.