Super interesting blog, I have been trying to wrap by mind around the complexities of generic subdomains. We tell ourselves this is "simple" off the shelf solutions but in reality they could be deeply embedded in our UX and coupled to core subdomains.

Still WIP but I have mapped it to be -

* UX coupled

* UX decoupled

which is really low coupling and the one above is high coupling with our core domain flows and for example I have been looking on the topic notifications as a UX coupled because for examples notification generate CTAs, we give personalization over them and more.