Hello, I've just written up an idea for an approach to getting many parts of Twisted and Twisted-based applications onto coroutines (ie `async def`). Details are given on https://twistedmatrix.com/trac/ticket/10327 The change involves the potential for some incompatibilities - though as I described on the ticket, I think these are likely to be very rare in practice and worth imposing for the resulting payoff. This thread represents the start of the process for making incompatible changes to Twisted as described at https://twistedmatrix.com/documents/current/core/development/policy/compatib... There is not yet a branch but there is a patch in a comment on the issue (the change is extremely small) for anyone to try out or comment on. I will follow up when there is a version closer to what would be merged into trunk. Meanwhile, feedback is welcome. Jean-Paul