You're right. The key thing is the spectrum of freedom induced by the library/framework. For example, if use something like PHP then you live in a prison of the

You're right. The key thing is the spectrum of freedom induced by the library/framework. For example, if use something like PHP then you live in a prison of the request lifecycle. Sometimes the prison is socially enforced by not having shared state between requests within a process. There is nothing special about websockets, but they do confer a freedom and responsibility.