Thanks for that explanation, I think I get that. The part that still worries me though, is how absolutely everything in the app is decoupled, even where tighter

Thanks for that explanation, I think I get that. The part that still worries me though, is how absolutely everything in the app is decoupled, even where tighter coupling makes sense, like where the coupling doesn't pass through a security boundary. Also not sure how the terms facade and interface are overloaded?