Ebikes work really well. The only disadvantage I can think of is it's much harder to take a bike on public transport than a scooter so the escooter makes a better option for getting to the pt stop
Not really.
A child's kick scooter is small, but adult sized electric ones are long and fairly bulky.
A folding bicycle is roughly backpack sized, and easy to stand over (like a backpack) on a metro train.