I agree getting permanence and googlability should be high priorities. If slack just moved to Discourse or SO the answer time would be as short.
I also wonder about comparative advantage. It seems like there are Julia world experts spending a fair amount of time answering beginner questions by people like me. This seems extremely inefficient. Better to have them writing packages and documentation and courses, no? More intermediate people could answer most of the questions. Again, just a thought (speaking of saying embarssing things).