We run 1000s of machines in Azure. It's garbage. Very few features work. Nodes are always having strange issues, especially on the networking side. And the worst part is that Azure support has 0 interest in actually debugging things. We just got out of an outage today caused by the insanely slow SSDs that they attach to their postgres dbs by default.
> At some point, you will have many teams. And one of them _will not_ be able to validate and accept some upgrade. Maybe a regression causes something only they use to break. Now the entire org is held hostage by the version needs of one team. Yes, this happens at slightly larger orgs. I've seen it many times.
The alternative of every service being on their own version of libraries and never updating is worse.