With California taking the lead here, I am not surprised at all. As both a motorcycle rider and ebike rider, you'll find plenty of both, especially in the mountains, on weekends, but so too during the daily commute. Due to being California and the year long good weather, we ride all year long.
That said, you just cannot predict the behavior of people in cars, and we are in very tight quarters with them. There isn't alot of room for error. I've seen my fair share of close calls and unfortunately, 2 eye witnessed fatalities.
Good read. Thanks for posting.