Also, too: Wifi has inherent galvanic isolation with a wide gap. It isn't strictly necessary, as anyone here obviously knows, but it can be a cost-effective w

Also, too: Wifi has inherent galvanic isolation with a wide gap. It isn't strictly necessary, as anyone here obviously knows, but it can be a cost-effective way to isolate the [electrical] pokey-bits from the [meat-based] pokey-bits, and to avoid loops when things go wrong. Wireless has uses beyond just eliminating wires.