[gregors]

The problem is the websocket implementation (last time I tested it) sucked. I'm assuming even now if you're doing non-trivial websockets you need to use the node or golang implementation.

[aantix]

You can swap out the ActionCable backend with different providers.

Redis, postgres. I think there's a couple of commercial offerings.

solid_cable is a database polling mechanism which can also be swapped in.