The era you're describing is possible today if you build your own e-bike.
You can pick up a kit from ebikeling which includes standard throttles, hub motors (or mid-drive if you're into that), pedal assist sensors and displays.
You can buy one of thousands of batteries with XT60 connectors or solder one to any battery you'd like.
You can pick up a kit from ebikeling which includes standard throttles, hub motors (or mid-drive if you're into that), pedal assist sensors and displays.
You can buy one of thousands of batteries with XT60 connectors or solder one to any battery you'd like.