I seem to use asyncio a lot, so maybe it's just good for internet plumbing. Things I've used it for:

* A Postfix TCP table.

* A milter.

* DNS request forwarding.

* Reading data from a Unix domain socket and firing off dynamic DNS updates.

* A DNS proxy for Redis.

* A netflow agent.

* A stream feeder for Redis.

https://github.com/search?q=user%3Am3047+asyncio&type=Reposi...

By the way you can't use it for disk I/O, but you can try to use it for e.g. STDOUT: https://github.com/m3047/shodohflo/blob/5a04f1df265d84e69f10...

  class UniversalWriter(object):
    """Plastering over the differences between file descriptors and network sockets."""