As a kind of tall person I always felt it was crucial to sit in the car and make sure the headroom was ok. Especially cars whose specs and dimensions indicated theoretically plenty of headroom, but then you get in the car and you keep banging your head on the area above the driver's door window when trying to sit in the car.
Or discovering when you go over bumps, that's when you bang your head.
I remember testing out a Porsche Boxster in 1999. Got in, banged head on ragtop roof. Considered that an instant showstopper-- was about to get out of the car, and sales guy saw me about to get out of car, and he said wait a sec, then he got out, came to my side of car, opened door, reached down, and pulled some sort of secret lever, that lowered seat another inch. I bought that Boxster.
Or discovering that you have no place to put your legs, and your knees are in hard contact with the dash, and the dash isn't cushioned, and hard plastic is gouging holes in your knees.
Or discovering there's no comfortable place to put one's right elbow while driving--too high, too low, not just right.
All of these considerations can lead to instant showstoppers for me. So a test drive is crucial. We loved the Model S test drive we took in 2013. Even my wife loved it. Made all the difference.
I struggle imagining going through the paperwork/financial hassle of buying another Tesla without a test drive. It helps running a large Tesla Owners Club with regular meetups, so I can sit in any model/configuration imaginable, and have, but not everyone has that luxury.
Also, I don't relish the idea of Tesla putting an additional burden on Tesla Owners Clubs having to serve as proxy Tesla salespeople -- for free -- in states with no stores or galleries.
So I am concerned about Tesla's new strategy.