It is still abstracted, nothing changes from the point of view of most applications.

It just opens more possibilities and increases the isolation.

From the article:

> A dyno should let you run any application or set of processes that you would run on your local machine or on an old-school server.

As soon as you allow multiple processes per dyno the abstraction becomes less clear. It means that now a dyno is more like a small VPS and I have to know which process is on which dyno for communication.

You don't have to run multiple processes if you don't want to. You shouldn't have to change the way you do anything of you're happy with your app now.