It's the combination of power, weight, no barrier to entry and overall lack of imagination/consideration in the general public that concerns me.
Still, I find cargo bikes are cumbersome enough that people tend not to ride them too quickly. The "SUV" bikes and electric mopeds pretending to be bikes that concern me more.
"electric mopeds pretending to be bikes" is a very apt description, and they make me pretty mad as well. I have to keep reminding myself that, egregious as they are, it's one less person in a car and one step closer to a critical mass of "bike culture", where biking is normalized. Biking will look very different once we reach that critical mass, but we'll all be better off overall.
Still, I find cargo bikes are cumbersome enough that people tend not to ride them too quickly. The "SUV" bikes and electric mopeds pretending to be bikes that concern me more.