I think once they get more interested and involved they'll wake up to the specific component needs of e-bikes, meaning they won't need to tread on toes with motor setups that aren't in their skill bank.
Immediate needs are a large spindle cassette system, a good range of stronger multi-sprocket freewheels, and wider sealed bottom bracket inserts to accommodate the crank drive add-on motors like the Cyclone and Sunstar.
Other itema needed are gear changers that incorporate a switch that can be set to cut out on one or two of the upper gears. Bikes with the Panasonic and Yamaha systems are currently undergeared because they must not power to over 15 mph, so the top gear has to be too low to realise that speed limitation. Having an electrical cutout on the upper gears would allow the limiting to operate after the gears that take the bike to 15 mph with reasonable cadences, leaving the uppermost gears ok for the rider to cycle beyond in comfort. That would meet the legal requirement while allowing the bike to have sensible gearing.
So there's enough there for Shimano to get busy without getting involved in motors.
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