A local perspective from ground zero of the EV revolution.
According to the California New Car Dealers Association, electric vehicle sales for 2018 make up 7.7% of all new vehicle sales in the San Francisco Bay area. Considering that the Model 3, by far the most important volume electric car, has been ramping up all that time, the percentage for August alone must be much, much higher: I would guess at least 15% of new car sales have been EV's, and those largely Model 3's. Maybe BMW, Mercedes, and Audi can stay afloat here on service revenue until their EV's arrive, but the ICE sales situation for those brands in this region looks dire to me, and I don't see how it can ever get better.
Seeing what it is like to have a lot of Model 3's around, I do have some advice for Tesla going forward: more paint and interior colors. Even if you can't do a lot of them at once, add new ones and retire old ones. The more Model 3's there are in an area, the more people will want to differentiate their cars from all the others. Color is highly effective and has no engineering cost. We are already seeing a growing aftermarket of personalization items, but cars coming out of the factory could really benefit from more variety. Might not matter in places where there are only a few Model 3's in town, but once you have several per block, which is where we're going, it's a different story.