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I suppose if you have mobility or balance issues it'd be easier to use
This is all I could think of.
Same as the Piaggio MP3's selling point
That it defeats all the practical advantages of a scooter - filtering, manoeuvring etc. - and solves none of the disadvantages - weather, safety etc. ?
Both are the answer to a non-question.
Tho there are a lot of 3 wheel scoots in Paris for some reason.
Same as the Piaggio MP3's selling point - you're much less likely to lose the front end than you are on a bicycle. I have a feeling that what is a nice idea for nervous moped riders is less of a good idea for an e-bike.