I disagree, I went that route and ended up regretting it. While converting a regular bike to an e-bike does work, a standard commuter bike is designed to carry a person’s weight with the center of gravity in mind. Adding an electric hub motor and a 20 lb lithium battery to a frame with cantilever brakes just feels sketchy. A properly designed e-bike typically comes with four-piston hydraulic brakes, and the placement of the motor and battery is engineered to maintain balance and handling.