I think serverless basically just means sharing more with other customers. You don't juts share the same hardware running your own VM on it, you share the same

I think serverless basically just means sharing more with other customers. You don't juts share the same hardware running your own VM on it, you share the same VM executing a big program one part of which is your lambda-functions. This leads to better utilization of hardware resources. It's not about a cloud vs. inhouse you might have the lambdas of your different departments running in the same VM. "serverless" really means "shared program".