Lots of 100k+ Model S running around these days, but not as many stories on the newer cars. I hit 100k on my December 2016 Model S 75 this past weekend, so I thought I'd recount my tale to date.
Drive unit replacements: 0
Battery replacements: 0
Door handle replacements: 0
Times the car left me stranded or otherwise refused to drive: 0
Supercharging speed: INCREASED from new thanks to recent software updates
Headlight replacements for burned out DRL (warranty): 1
MCU replacement for yellow screen (full MCU replacement because screen was backordered for ages - warranty): 1
MCU yellowed screen AGAIN this time out of warranty: DIY fix with UV light for $35
Squeaks and rattles: Countless
Current 100% range as of this morning: 216 miles - ~13% degradation from new (fairly steady and consistent, no large sudden drops)
Generally speaking the car has been quite reliable and not demanded much more from me than tires. I just recently installed my 5th set:
OEM Goodyears: ~20k miles
Michelin MXM4: ~30k miles - $900
Michelin MXM4: ~30k miles - $900
OEM Goodyears: ~20k - $660
Michelin MXM4: currently installed - $900 (not counting this in maintenance total as they've only been on a few thousand miles, will count towards the next 100k)
Out of pocket service has been infrequent and uneventful:
Year 1 service (performed at ~25k miles): Complimentary (I had some light scratches on the top of my bumper from a misaligned hatch lid that Tesla offered to fix by repainting the bumper. I declined and they instead comped the first year maintenance.
Year 2 service (performed just before 50k miles): $725 - This was probably unnecessary but I opted to have it performed while the car was in for some minor warranty issues described above (burnt out DRL, yellowing screen, etc). Since the warranty was set to expire I decided the $725 for a full inspection/service was money well spent.
Year 3 maintenance items (performed at ~75k miles): $540 - replace HEPA filter, tire rotation, alignment.
I have not been religious about tracking my energy costs, but the car has reported a lifetime consumption of 31,464 kwh. I do have free supercharging, but estimate that represents at most ~10% of my miles. For the purpose of cost estimates I'm disregarding both the free supercharging and the money I've paid at relatively high-expense public L2 charing stations, assuming they are more or less a wash. 31,464 kwh at my estimated yearly average of $0.13/kwh = $4,090 in electricity. For reference, my prior car, a rather efficient VW Passat TDI with a lifetime fuel economy of 40mpg cost me $8,750 in diesel over the same 100k period.
Thus, my total cost to maintain and operate over 100k has been $2460 (tires) + $1265 (maintenance) + $4,090 (fuel) = $7,815 or 7.8 cents/mile.
Speaking generally, I'm still in love with the car and look forward to driving it every day. Some of the shine has worn off with respect to Tesla the company - while my service visits have been very infrequent I do have trepidations about becoming more reliant on their service organization as the car continues to age. The MCU has become a weak spot and I'm not looking forward to that eventual repair. I suspect I'll need some suspension work sometime soon as the whole front end has gotten a little clunky and noisy over particularly rough surfaces.
The battery degradation has been a real bummer, much more than I expected given the experience of others to date at the time I purchased (however, given what's currently happening with the 85kwh batteries, it seems that ~10-15% degradation over 100k miles is a more reasonable expectation than the 2-3% that was being reported at the time). This winter has been the first time the reduced range has really had a tangible impact on me - just this weekend I took a trip to Sacramento that used to be easily achievable in a single charge, but the cool temps and reduced range forced a splash and go charging stop this time.
Reliability wise, the car hasn't skipped a beat. The interior surfaces have held up quite well and while there are indeed a ton of squeaks and rattles, my usual commute is a bit of a torture test in this regard and every car I've ever subjected it to for any period of time has had similar results in this area.
My current plan is to keep the car for the balance of the battery and drive unit warranty, which should take me to ~250k miles if nothing dramatic changes in my current work/living arrangement. Here's to hoping.