@cg
I'm not questioning that it works. As @olivierlambert said, those templates do not include much and do not change even over multiple major releases.
But I really think the major releases should be in the templates, as the missing current OS versions give the impression, that xcp is somewhat lagging behind (lagging behind the competition, that is).
In my company we are advised to use RHEL, as we have running support contracts with Red Hat. So releases like RHEL, CentOS, Debian etc. are really important. But you know best, what your customers use...
Not sure if I want to register my XOA, as I'm only running 3-5 Linux VMs on one machine. Tried Debian with KVM and cockpit before, but it did not meet my expectations.
When there is a future release of xcp, I would be willing to give that a spin too.