@johncarlosbaez writes
"(I would like to talk about even more advanced stuff, but there's little audience for that here.)"
Or almost anywhere?
Of course, there are specialized communication forums for that. But what I like here is that we can reach more people than in the specialized forums.
The ultimate specialized forum is a long 1-1 email thread with somebody you can relate to researchwise.
I like all levels of (non-)specialization for communication, discussion and dissemination. Including this one.