One for the parents out there

I wonder if the Bakfiet is much more practical, it look like the kind of bike that you'll be able to use more often that just carrying your kids.

Bingo!
I think both can be modified to cargo bike after the kids have grown out of it (simply remove seats). The trailer option doesnt really allow for this (as far as I'm aware), which is why I thought the cost of the cargo bikes was defendable.