Also year-round commuter in Norway w/ an e-bike. I agree that the increased speed increases the probability of an accident. I've personally had several close calls vs cars in roundabouts and on bike lanes (!).

I also have a motorcycle license and I've been riding motorcycles for about 5 years in traffic. A lot of the risks are very similar to the ones you experience on an e-bike in my opinion.

Edit: The best tip I can give to two-wheel riders is to increase visibility as much as possible, and be observant of cars. Lights and bright colored clothing helps a lot.