People often buy e-scooters here in France because they cost less than an e-bike, take up less space, interoperate better with the public transit network and can be folded up into a manageable size. You can take them with you in busses, trams and trains. You can put them in a trunk easily too if you're still using a car for some trips.

The disadvantage is the smaller wheels and being lower to the ground, it forces you to keep your hands on the handle all the time as it's not self-balancing like a bicycle, makes going up curbs trickier (you have to take them face-on, you'll tip over approaching them with too steep of an angle), and scraping the ground if you're going down a tight slope/leaving the ramp of a flight of stairs (the platform isn't that much higher than the wheels)