I don't want to be "that guy", but BMW has been making a very popular and successful car since 1986 called the M3. Many of you have owned one, I have owned 2. We simply can't refer to the Model 3 as the M3. It would be like Burger King coming out with a new hamburger and calling it the Big Mac. To this day every time someone refers to their M3 I think oh cool they have a M3, oh wait they're calling their Tesla an M3.
Someone has to come up with something different. I'm not the creative type, it won't be me.