Some things of note as well I think worth mentioning is
+ Towing package standard
+ Option for foldable 7 seats
+ Option for 6 seat and center console
+ Pricing differences?
+ Three position dynamic LED Turning lights?
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The foldable 7 seats is huge for those who would be interested in that.. My list is probably not fully correct or comprehensive.
@MXWing
You are right about those notes, of course. The standard base features and price has changed and a few options (unrelated to my chosen spec) have appeared.
Mine wasn't really supposed to be a comprehensive list of product changes, but a comparison of what my car has that isn't available today vs. what it doesn't have that would be in my car had I ordered today with my chosen spec-level (loaded 6 seater). Just to illustrate one scenario that can happen in this crazy Tesla twilight zone.
You are right that standard features and prices have gone up and down several times over the course of the year. The prices actually went up after I got my car, but since then I think they may have gone down somewhat. Premium Upgrades included e.g. the sound system upgrade etc. It is possible that my car would be cheaper today as specced. It is loaded, so it has turning LEDs, towing and premium sound, but they were part of paid options of course for me.
I agree the 6 seat center console and 5/7 seat folding certainly are major options that have appeared after my order. They are not for me, but certainly for someone they are.
I always wanted the 6 seater specifically, with the open center and not the console. So basically in my specific case I'd be out all these things: ventilated seats (discontinued), adaptive spoiler (discontinued), leather (discontinued), Alcantara dash/headliner (current status unknown, has been discontinued at times since), Helix wheels - the only wheels I liked (discontinued), free trim choice at time of order (extra trim choices since discontinued/packaged), glossy seatbacks, free supercharging for life of car (discontinued)... I believe there was also a couple of extra paint choices at the time.
And out of the additions the car has gotten only AP 2.5 as something I'd want instead of AP2 and possibly a little lower price. Pleater and matte seatbacks would not have been my first choices, though they are not a problem for me either. The entirely discontinued missing items are more of a problem...
However, I fully expect that sometime in 2018 Tesla will come out with big battery, 21-70 cell, new charge port (CCS for Europe), increased performance, new dashboard, new MCU computer, possible HUD... which will make my car look like an old turd.
So certainly someone thinking of that purchase today, has that additional thing to think about.
So for me, re-buying my car today would result in a worse car than a year ago. But give it 3-12 months depending on which rumor to believe and I expect things to change dramatically after the upgrades.