Battery life anxiety/range reduction is a no different than engine rebuild anxiety in my assessment of this car.
At 200k your mercedes Audi or BMW will need a rebuild. Some earlier, others later. If you don't do it yourself your cost will be around 10k for a 5 series BMW motor of todays dollars. Ten years from now, add another 1-2k. This wouldn't include installation. There is also a very good chance you will be near your second alternator, battery, bearings, water pumps (at least one), exhaust repairs, brakes....
I'm seeing the cost issue as a complete financial wash at worst around the 200k mile range for either car. I'd be willing to bet the tesla is lower cost even with 30%-40% lost range. it still runs...
here is the car Tesla S has inspired me to sell after 28 years. She is a beauty, i've restored her two full times (the second after a drunk in a trash truck smashed her). This is like losing a limb to me. I'm a car nut, I love America, I love American cars more. The Model S is finally "the one" for me.
1969 Ford mach-1 Mustang R code 3:92, top loader 4 speed. Raven Black with red deluxe interior. 50 Miles on rotisserie restoration that took me 10 years (I got married....it's murder on your free time).
another can be seen here:
Both taken @ wings and wheel Buckley AFB Colorado (before the second rebuild) This was circa 2000 i think.