I've been commuting on 16" & 20" wheel folding bikes in NYC since 2013.

In the last 4-5 years, I've used many different 14" & 20" wheel folding e-bikes.

The smaller size of folding bikes allow it to be carried onto public transportation like subway or buses.

Smaller target to get hit by motor vehicle if you ride among traffic, easier to filter through car mirrors while they are stopped at red lights.

Depending on your needs, there are plus & minuses between models that may have Built-in frame battery, seat post battery or external battery.

Having tried fat tire folding bikes, I find them to be too cumbersome. Better suited in you are a heavier rider or carrying heavy cargo with your e-bike.