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@Nick B: Glad you find it useful...
The annual service (you can see I liberally skip around with the intervals) is very useful as a "go-over" and allows Tesla to service interim hardware updates and other concerns that software updates can't address.
On the subject of long term cost, I may have a different take on the meaning of "cost". If I was solely looking at $$cost of ownership sans the warranty and all the goodwill Tesla has extended me after it's expiration, this car would be amongst the biggest lemons imaginable. As it is an earlier vin, many people like myself have been beta-testers - later cars have many fewer problems. It is possible, too that I may have gotten a Tesla lemon.
Regardless the problems, this car still scratches all the itches and outperforms anything else on the road with seemingly no diminution of performance over time. What further COO criteria does one need?