Go one step further and become a Bicycle Guy. Consider what will still be operational 100 years from now once fossil fuels have dried up and we have fully transitioned into Life As A Service.
https://www.bicycling.com/culture/a41119529/the-most-dangero...
If only homicide was illegal, then no one would kill anyone else.
what in tarnation
It's not clear to me that the wireless shifters themselves communicate via Bluetooth, though the system does use that to talk to a smartphone app, if desired.