I had originally configured the 85D but after driving the 85 and P85 (no D is available at any store yet) I decided I needed the extra power, especially after coming from a sub-4 second 0-60 AWD car. This was the main reason I went for the P85D.
The other five items that got me to switch were, in order of importance:
1. Next-gen "bucket" seats: while spiritedly test-driving the P85 through twisty roads, I definitely felt the existing seats were not up to par on lateral support. Next-gen will likely be available for non-P85D models, but I'm not sure when that will be and am not willing to wait.
2. December vs. Feb delivery: since I'm not leasing, the $7500 fed credit would have to wait an extra year since it's a refund on tax liability for the fiscal year during which the car was delivered. Again, not being the most patient person in the world, I wasn't willing to wait (and can invest the $7500 in the meantime).
3. "Free" alcantara headliner: it's an extra $1500 for the non-P models, whereas it's included in the P versions. Not a huge difference given the $100+k price tag, but nice to have and reduces the perceived added cost of the P85D versus 85D.
4. Carbon fiber spoiler: it's not available in non-P models, and even though I won't be driving at 100+ mph most of the time, I do like the way it looks a lot - especially on the red paint.
5. Red calipers: also not available on non-P models, and looks amazing with red paint!
As to your question on depreciation, the Guaranteed Resale Value gives a year 3 price of 50% of the 60kWh plus 43% of any options above including the 85kWh battery, so the depreciation of any option is 57% over 3 years.
Not sure it 85D would depreciate more or less than the P85D in the eyes of buyers other than Tesla itself, but as far as Tesla is concerned they value the drop % in price the same between those 2 models. I would personally value the P85D more given its amazing performance.
At the end of the day, it's a personal choice and no one can make the call but yourself. It all comes down to whether you value the additional performance and option choices the P85D offers. I certainly did :biggrin: