Serverless is like AWS lambda, when you don’t have an explicitly running VM that you pay per time; instead your code is run in “a cloud” and you pay per invocation.

This is nothing new! “Serverless” is well defined and understood for years and years!

This is actually what Fly machines do under the covers. When you use it as a PaaS, the client CLI sets all this up for you, and then our proxy starts/stops things as needed.