Our early 2013 P85 is at 75K miles. At the end of our first long road trip, we encountered some problems on the return home, and while Tesla's Service Centers were fantastic to get the car repaired and operational again, the potential cost of those repairs raises a concern. Especially with the early production cars, Tesla has made a lot of design changes since then, not only adding capabilities, but also improving the design (and hopefully the reliability) of the newer production cars. It's possible that the early production cars may require more maintenance as they age - and as we get closer to the 100,000 mile limit on the extended warranty, there's concerns that maintenance costs could be higher than expected, even with the 8 year unlimited mileage benefit for the battery pack and motor. For those Tesla owners approaching 100K miles - does anyone else have this concern? Should Tesla provide an option to extend the warranty for an additional 4 years/50K miles?