[gwillz]

I don't believe python 2.7 could ever do async. Async was only possible in 3.3 when `yield from` landed and then was bastardized into coroutines through decorators.

3.5 released true asnyc/await based on the `yield from` form and then 3.6 allowed for async generators.

You were close and your point remains. Although I don't think new tags are the right choice. I think HTML learnt a while ago that more tags doesn't solve everything.

I do really enjoy python async. It's cool to see a feature develop from a hack like that but a language first approach could have avoided some headaches. This is where Grid wins, it's a fresh take without requiring to maintain backwards compatibility with previous attempts.