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Of course, while hard wiring is logical, wireless (Radio/Bluetooth/IR) is the ultimate answer.

*Basically the tech in micro helicopters which has been around for a while now. (Prob in development already tbh)

imagines tour saboteurs jamming derailleur frequencies

I have an old non cycle related project with this exact technology. A linear scale controlled via radio. Just too bulky atm. /csb

So tomorrows biek control will be 4 recievers, (2 derailleurs + 2 brakes) and 2 transmitters, (levers/shifters) as part of groupset. The only thing holding it back imo is maintenance.