Yesterday I realized that if my trunk was a lot shorter, the Model S experience would be fantastic in terms of seeing out of the car.
Here is the phone held up to my eye height right in front of my eyes while on California1 North. Note how I can barely see behind my car through the rear view mirror in one picture, and not great in the other, but almost as well as Az_Real's. If however I look in my side mirrors, I can see much further back.
Comparing to Az_Real's very good demonstration photographs, I see that I could probably try harder and get it to work when the cars pull up immediately behind me, then I can transfer seeing them to my right or left. In flatter areas, perhaps it might not be as bad, but I rarely drive in flat areas. The headrests in my situation seem to be partially in the way; dropping the seatbacks could help in that case.
(Side note: AZ_Real's camera is
much better than my iPhone 6s. I didn't pay any attention to camera settings, though, for obvious reasons.)
I tried crouching below what my back will allow me as an experiment, and the pillars that surround the windshield drop away and the view is fantastic! But back in normal height, a huge portion of my view is blocked by the pillars on the side of the windshield. Cars are just shaped wrong for good visibility. That might be because I have a tall trunk, though.
One of the things I loved about my Mercedes was that the windshield allowed me to see out of it around me forward comparatively well compared to most cars I drove. The only other types of vehicles that allowed that for me were large heavy (called "Commercial" in USA) trucks (Volvo, Freightliner, even Mack, and the occasional Kenworth). Most cars just love to block the view.