It's the exhorbinant initial cost of the e-bikes that is holding people back.
I would love to see an American company outdo the Chinese on a large scale with small EVs with shops and services at a price that brings them to the masses here -rather than container loads shipped in from China.
If that happened, and more people would be on them and more infrastructure would be developed around their use.
I've lived in a bunch of parts of the world and haven't seen them take off anywhere close to what goes on in Chinese cities. In Beijing, I could pull the bike out of my house and go from one side of the city to the other back with it. Haul it in the door and plug it into charge. No traffic jams, looking for taxis, dealing with the subway... just out the door and GO. Oh and none of the parking hassles either. Hitting a small store? Just lock in 10 seconds right by the entrance. Outdoor bar or restaurant, park it right by your table.
In Beijing I lived near a massive farmer's market and you can shop on the e-bike! Tell the vendor what you want and they plop it in your basket. Same way in the old neighborhoods. I could pull the e-bike outside and get everything I needed going around the alleys by my house. Vegetable vendor, cig vendor, meat, alcohol... you just pull up and they plop it in your basket. I'm out the door and back home again with all my shopping done in 5-10 minutes.
I had a coworker who lived in my neighborhood and commuted by car. I'd usually beat her car with my e-bike coming or going to work -cuz no parking issues, traffic jams, etc. She was like "Damn, why am I driving a car at all and paying through the nose for parking?"
E-bikes have their EV lanes, but if that's congested there's the sidewalk or the road itself if the traffic is slowed down. Small-scale EVs are an amazing method of transport so, yeah, I'd like the see it take off in the US and elsewhere.