@vascolucci I can always count on you to keep me humble 
The short answer is, no, it doesn’t by itself open the door.
I’ve been thinking about this question for the past year, and every time I come off a part of the code that relies on an app’s domain, I think “how much more complex would this be if apps could have more than one domain?” I’ve been making changes to our networking stack in a way that will allow us to get there, but there’s still work to be done.