For reference I'd say the "current async framework" is either Starlette [1] (low level) or FastAPI [2] (high level) for web stuff, and trio [3] for more stupidproof general async than twisted. IMHO of course!

[1] https://www.starlette.io/ [2] https://fastapi.tiangolo.com/ [3] https://trio.readthedocs.io/en/stable/