Too many to list, some I built myself including the frame. I "do" ~ Human-Only-Pedal-Powered-Cycles, Human-Electric-Hybrid-Cycles, Human-IC-Hybrid-Cycles, and one Human-IC-Electric-3way-Hybrid-Cycle
My first thought is "Only 100-lbs?"
Electric assist is very nice especially for cargo bikes when climbing a hill, but only a 100-lb is a little on the light side for a cargo bike.
Price tag is a little steep to say the least, One can just buy a Yuba and put an electric assist kit on it and come out with a smaller price tag and have up to four times the cargo capacity.
As to just getting a car, yah, I can see that in some ways (I am myself car-light not car-free) but some of us do understand the significant savings in both monetary fuel costs and reductions in pollution realized by an electric assist cargo bike compared to a car not to mention we might just like to still get our exercise and like to ride a bike. There are still certainly some loads a cargo bike can't handle, your not going to be hauling a load of those giant round hay bails on a cargo bicycle, you need a good 2+ ton farm truck for those.