The high end models of "regular" high end car manufacturers also get service like this -- at the Audi dealer I use for dealer service (Stevens Creek), they have 2 dedicated mechanics for R8s. If you have an R8, you get essentially the Tesla service -- it's picked up at your home or office, you're chauffeured in an A8L if necessary, etc. For my 7 year old used A4, I just get a free loaner A4, TT, or Q5 for as long as service takes, which is fine too. I still go to an indy shop (Advanced Autowerks in SF) for non-warranty stuff now that I'm out of Audi Care service period, though, where they just give you $4 for the 3rd St Muni roundtrip. I assume MB SLS and other similar cars get similar treatment. Although, outside of San Francisco (parking), it seems unlikely anyone who owns a $200-300k car only owns that one car.