For me the interesting thing is that the very lack of coupling seems like a problem to me. If A depends on B, I'd actually like B to be coupled to A. Back in

For me the interesting thing is that the very lack of coupling seems like a problem to me. If A depends on B, I'd actually like B to be coupled to A. Back in the old days when I believed "generic components" were a cool idea, I'd always run into that problem. It's too general and so it has not structure. And then it is actually implicitly coupled (even if it has a network system and a communications protocol in the middle) -- it's just that you've abstracted away the interfaces with a bunch of adaptors. It's like having a plug on your electronic device that can fit any socket, but only one of the many sockets actually works. I imagine the author has techniques for dealing with that kind of problem, but has unfortunately not shared them. Maybe another time.