Witch is a good recipe to pay much more thinking to be smart and pay less, being tied to some third parties decisions for anything running, having a giant attack surface and so on...

There are countless lessons about how owning hw is cheaper than not, there are countless examples of "cloud nightmares", countless examples of why a system need to be simple and securely design from start not "isolated", but people refuse to learn, specially since they are just employees for living on the shoulder of someone else means less work to do and managers typically do not know even the basic of IT to understand.