I saw this bike made by an independent bike shop for himself.
It’s an electric longtail and can carry a 300kg europallet, plus the toolbox on the front, plus an extra person or material on the bike rack!
Here is the link to the shop website: https://www.cycles-penet.fr/
Sorry, I got lost in my reply. Electric brakes done well are not noticed. Surge brakes you can feel the trailer push against the truck before they kick in, and oscillate - it isn’t much but you feel it. Surge brakes mean you cannot back up - the trailer brakes turn on when you are in reverse.
Electric brakes also meant that when the brakes failed on my truck went out I was able to stop safely and limp to a place where I was able to get a repair done. This is kind of a niche, but still one I’m glad I had.
That oscillation must suck so hard on a bike. I can imagine that getting really dangerous fast.
I gotcha, fair points. I’ve never hauled one, they just seemed neat.