Really this is the secret sauce of the cloud. Create new abstraction layers where you can charge for logical separation on a physical basis. First VMs, then containers, then serverless... Would be cool if somebody did it with bandwidth (looking at you, Cloudflare). Why can't I buy an elastically sized pipe? Why do I need to pay for the stuff I put through it instead of reserving a size for the time I'll need it?
[0] https://twitter.com/eastdakota/status/1371252709836263425