On: The PEPs of Python 3.9

[BiteCode_dev]

Given how heated was the debate about those, it's good we didn't try to go too fast with it.

I'm full of hopes for this feature, but it's going to be a slow hard work, and we'll only rip the benefit on the long run. So no use to rush it.

I feel like we rushed asyncio and type hints, and it took years to make them usable after they were introduced.