Yes, was surprised when they discontinued the Performance Plus suspension after April 2015. Red-tinted interior lights, etc., P100D exclusive wheels, etc., Many things they could do to set the car apart.
I'm glad that they don't do very much to separate the cars appearance wise and see several advantages in that.
Among the benefits is that it minimizes the chance of development of a caste system within, and more importantly, outside of the ranks of owners, because it is visually difficult to tell the most powerful Model S, from the least powerful Model S.
This in turn reinforces and drives home the subliminal message that "all" Teslas are great. Not just the most powerful ones that look different from the rest of them. And if an owner of another vehicle happens across one, then chances are he has no idea whether he has come across the most powerful one or not.
It cuts down on "posing", or the practice of owners of less powerful models attempting to make their cars look like the more powerful variant, so as to fool onlookers, by adding body parts etc. purchased either from the manufacturer or in the aftermarket.
It lessens the chance of the manufacturer charging extra for the appearance items, which "start out" being "exclusive" to the performance version, and then later on offering the same visual cues and appearance items on less powerful models, after having earlier had others pay for that exclusivity.
It saves money in production costs as the body parts and many other parts are interchangable and require no additional production effort.