Complex uncapped pricing is not a theoretical problem. Cloud lock-in is not a theoretical problem. Loss of control in case of downtime or a "ban" is not a theoretical problem. Cloud reducing complexity is questionable and may swing the other way.

They are valid concerns or at least warnings. You're obviously right that there's tradeoffs but the thing I'm sensing in our industry is that it's increasingly seen as just the default "thoughtless" infra model.