Might work great where it's super mild all the time like Europe or parts of California. Probably not awesome in the US South.
The issue I’ve seen (can only speak for a large city in the US) is still accessibility. Like entrances, finding elevators, ramps, etc. especially in older buildings.
For the record I got to experience this first hand when I hung out with an old colleague who was injured in a car crash. And this was at the DC convention center, a relatively new building. Finding elevators and navigating around took way longer, especially when you were lost. But I will say that it was amazing how everyone around him was willing to help in any way they could.
Regardless, removing cars anywhere is a win. Get something going like this and innovations to allow for different climates will follow.
For little electrics like this, the low price may be the sleeper feature. Cars keep going up, up, up in cost. People might look at these as a 2nd car, then find they are increasingly using their 2nd car....