I understand this in its abstract sense - but I think (IMHO) the fundamental problem is that every framework out there is using Python 2.7.... which means nobody is using it.

I'm not sure if you have worked in the Ruby or Go ecosystem... but if you are starting a new project, you are using latest Ruby+latest Rails. this is not the case in Python. I asked a question here and on the /r/python forums. What framework should one use to build an API using asyncio+postgresql. Nobody seems to be doing it.

the answers I got mentioned using Tornado with Python 3 code on top of it.

People have compared asyncio with goroutines - but even for a project that is a migration from Go -> Python by a fairly advanced developer ... Py 2.7 is being used.