MB is also famous for running Kubernetes. At a 1000 individual setups (all automated of course!). I had the pleasure of flamewaring someone who was very proud of this and couldn't really explain to me, why they would not just get two big physical machines with Corosync for like 70% of those (internal) applications. Doesn't seem much worse than a 3-node Kubernetes cluster (which is going to experience serious disruption too if anything goes down if it is running at full load......) and I doubt that scaling is an important concern with this setup.