Hate to break this to you, but the internals of most "premium" vehicles when it comes to things like engines are largely unchanged year to year. I test drove a lot of premium vehicles last year and found most of them were using engines/drivetrains that were still based on 15-20 year old designs with only cosmetic (and cabin electronics) changes over the years.
So in that sense, the Model S is a baby in terms of maturity of the vehicle platform.
>>> I test drove a lot of premium vehicles last year and found most of them were using engines/drivetrains that were still based on 15-20 year old designs with only cosmetic (and cabin electronics) changes.
I'd love to know which cars you're referring to. I've been a huge BMW guy for years and they generally go on 5 year cycle with their engines and drivetrains.
For instance, on the M5 the E60 M5 used the same drivetrain and engine (with minor tweaks) from 2005-2010. Whereas the new F10 M5 engine and drivetrain was redesigned in 2011 and has yet to see any major changes in its current iteration.
I saw it across manufacturers the German manufacturers: BMW, Mercedes, and Audi.
On the Japanese side, Nissan/Infiniti abused the hell out of their 3.5L V6 in every car they made for more than a decade.
Regarding the BMW M5, the F10 is actually very similar to the F01 which came on the previous 7 series in 2008. Even the E60 was considered an upsized 3 series engine.[1]
Regardless, the point I'm trying to make is that Tesla is really trying to break new ground and needs about a decade for their vehicle platforms to mature before comparisons can be made with any of the current luxury brand. The other brands have a pedigree which goes back multiple decades so even their newer vehicles have a few decades of maturity baked into them.
So in that sense, the Model S is a baby in terms of maturity of the vehicle platform.