FaaS could be sharing your hardware at a function level inside the JVMs or whatever you are running, rather than at the VM or hypervisor level. You can (potentially) get much better elasticity and utilisation?
Software already shares hardware at the function level. You have far more visibility and control over this within your program than you do when you add an unnecessary layer of abstraction like FaaS.
Think more about the name: Function as a Service.
Why do you need to serve yourself your own functions? It makes sense only in the context of a cloud provider that's trying to solve the problem of underutilized resources used across many customers.
Yes, but I'm just confused because saying "Why isn't there an open source FaaS for on prem that shares hardware" makes no sense. At that point, you're just talking about regular coding with functions. Unless there's something I'm missing.
