I don't understand why running software on bare metal is viewed as a problem to be solved. how many layers of abstraction are necessary, and why? Obviously vi

I don't understand why running software on bare metal is viewed as a problem to be solved. how many layers of abstraction are necessary, and why? Obviously virtualizing serves a valuable purpose. Making development more accessible is great. Simplistic dev services like this mean reliance on others infrastructure, and being bound to cloud. Doesn't seem forward thinking. Can you imagine if Google had decided to run their search app on Microsoft servers?