[Sanddancer]

Dimmers need a few bits, probably 8+ for decent control. Waiting a few seconds for a light to dim would be rather annoying. Doing RGB effects would be even slower. Ovens need at least 10 for a decent temperature range. Authenticating a door lock would require at least 128 bits one way, and another 128 the other; 30 seconds would be way too long for that purpose. Plus, you need to take into account addressing, a protocol for the type of message, and other aspects in order to route commands to the proper node. 10 bits per second just isn't going to cut it.

[JetSpiegel]

If I'm 50cm from the door, there no need to use this protocol. This for the times you're not at home, but somewhat close.

If I want to turn the lights off and I'm at home, I just flick a switch.