Obviously not everyone. My Trek shop is use to adjusting derailleurs. (Maybe I need a to go to a place more familiar with rear hubs) I have two bikes with 3 speed rear hubs. One a Brompton M6R folding bike. Has a 3 speed rear hub and a 2 speed derailleur. (6 speeds) My other bike is an old West German folding bike with a 3 speed Sturmey Archer rear hub. All I had to do is put the oil, in the hub, and it worked great. I wish I could get the front hub electric motor, controller, throttle, and battery. Brompton doesn’t allow its dealers to sell it anymore. They are afraid it will hurt their Electric Bike business. They want you to sell your 2k folding bike and spend 3.5k+ for their factory e-bike.