just wondering does this forum run on a sme?
Most of our cluster runs some form of CentOS, soon to be Rocky, but not specifically SME.
Think there are various reasons - likely to do with behind scenes complexity (it makes my eyes water!). It's like an orchestra.
Things are locked down
extremely tightly, for good reason.
SME is good as a single server, but not quite so easy when it comes to sharing eg multi server SSO etc

Horses for courses. SME does what it was designed for. Clustering wasn't it!
Whether we change any of that when we upgrade the cluster I don't know. JP will know more.