Though it depends where you are, busses don't have the space to carry a lot of people with foldables. They'd need to be redesigned for such. I saw a Xiaomi foldable e-bike announced the other day for 1k USD, but then I saw this already exists. There's a lot of people driving around on 2-wheel e-bike (non foldable) as well these days. Today I even saw a kid on one going to school.