1. We had no name for that because it wasn’t a thing that happened often enough to need a name. I’m aware of the term "sunshower" though.

2. Southern California

But WAIT, there's more

Another factor is the (human) drivers themselves. Teslas tend to be very fast in a straight line, much faster than most people are used to from ICE cars. That likely lends itself to some people driving them unsafely. I can only imagine if I had had a car that fast when I was 16...