Cargo bikes are ideal for families that do a lot of bike commuting, who try to minimize car use, and who need a way to haul kids. Unlike most child bike seats or trailer, cargo bikes can be use for babies and “big” kids which means that the investment can be recouped over a lot of years.
They are also great for hauling all that stuff that comes along with having kids–library books, backpacks, balance bikes, groceries, Christmas trees, you name it.
If you plan on using your cargo bike as a primary source of transportation, have a long commute, live in a city with a lot of hills, have multiple children to haul, or are just otherwise motivated by an electronic assist, go for it.
The couple of downsides of an electronic assist is the extra maintenance involved, and the price. But when you consider the cost of an e-bike compared to a car, they are downright cheap.