Agree on all points.
Prefer Ubuntu.
CentOS mostly for work in the past, now Alma (not my choice). I have thrown in Ubuntu when I could arrange it.
Never an Oracle fan. I have to support one set of Oracle servers due to it being one of the supported platforms for some specific software, Informatica.
Sun hardware was awesome. We “recently” decommissioned some Sun servers. It was maybe 8 years ago or so when we moved out of a datacenter. I have no doubt they would still be running if we had kept them.