Lots of Proposals in hierarchy ! Just a single Stream & dividing in branches, I think generate a crowd of SO like sites !
SO is general for Software Developers. But, there are many proposals gathering on area51, many of them having subset of general proposals. As an example, different types of Engineering/Science in a common proposal of Engineering/Science.
or I think there should be some facility to embed proposals for moderators which automatically transfers the followers in between as well !
I don't know I am correct with this idea or not. Please share your views with this Idea !