I have a 2016.5 model s 75d that is coming up on 2 years and 50k miles. I have been weighing options on what to do next. Come September, I can do my 4th annual service $750, buy tires $800, and buy the extended warranty $4250, or possibly sell/trade in and get a new model s/x. Anyone have the warranty that can discuss pros/cons here? Such as, is there anything it doesn't cover? battery (12v not the 75kwh battery) and I hear there is a service charge for every visit. Is it worth it? Or should I just sell/trade and take advantage of the last tax credit and get a second set of wheels for referring myself and maybe sell those? Any conversation here would be super helpful!