[mkj]

This looks promising, though the "No Forced Trait Implementations" seems to instead require using a strange looking msg!() macro?

https://docs.rs/bastion/0.3.4/bastion/macro.msg.html

Seems less clean to read than Riker (https://riker.rs), though that doesn't really do async well.

[windor]

Yes, the msg!() macro is a little painful to write. I think it can be refactored into the pattern like `impl Handler<Msg>`. But beyond that, it supports async/await naturally. :)