I don't think half of the BMW owners I know are car guys (My accountant sure isn't)and I don't even think everyone on this forum who owns a BMW is a car guy based on some of the questions we see for help, further I don't think Elon Musk is a car guy. I think he is a visionary guy, I think he is a Marketer and a Salesman, but not much of a car guy. I do think he has "car guys" working at Tesla.Absurd. Virtually everyone who came from a BMW and went to a Tesla is a "car guy". Sure, it's not as refined interior wise as a BMW but driver experience? Way better. Handles better. Faster. What more does a "car guy" want?
I also truly doubt that even half of the buyers of Telsa products are car guys either (I know my friend with a model S isn't, although if you ask him he might think he is) and moving from a BMW to a Tesla does not help or change that.
As far as what car guys want it's hard to speak for everyone and I'll certainly get it wrong, but for me fast and handles well are high on the list, but it must have style, fit and finish, quality of materials, feel and sound or maybe no sound?
I remember back(early eighties) when I worked on my first Japanese car a first generation Honda Accord. after messing with loads of North American cars I was not looking forward to pulling apart the drive train of a rusty FWD car. But I was pleasantly surprised how simple and accessible it all was to work on, like the engineers had considered how the machine would go together and come apart for repairs. Now I think I value good engineering and good quality as much as anything.
Tesla has come along way in a short time, but for me I think Tesla still has some maturing to do.