Just wondering, why are so many people interested in getting the extended warranty? [...] Are people primarily worried about the battery pack?
No, because the extended warranty (which Tesla calls an "Extended Service Agreement") doesn't cover the battery. Which makes sense, because the battery already has an 8-year warranty.
Some have speculated the costs are going up because of all the minor cosmetic fixes that people are bringing their cars in for. Current costs no doubt are, but none of that stuff is covered in the extended warranty either - there are exclusions for appearance care, corrosion, paint defects, squeaks, rattles, leaks, wind noise, brakes, suspension, wheel balancing, hoses, A/C lines, connections, fluid changes, filters, wiper blades, bright metal, sheet metal, bumpers, moldings, carpet, upholstery, paint, shocks, 12V battery and cables, bulbs, beams, glass, interior trim, seals, gaskets, plastic, framing, and vehicle transport.
And there is a $200 deductible, so that's essentially an exclusion for anything minor.
And of course there is a long list of things Tesla really shouldn't be responsible for - neglect, abuse, damage from 3rd-party accessories, theft, vandalism, riots, etc.
My question centers more around - what DOES it cover? The motor, gearbox, and electronics? I doubt anything will happen to the motor or gearbox during years 5-8. So I see this primarily as covering the car's electronics. Mind you, there are a lot of electronics in the car (chargers, inverters, vehicle control, touchscreen control, etc), and for a lot of it Tesla (with their high labor rates) will be the only place to get it fixed.
Am I missing something else important that is covered?
BTW, note that the same agreement for the Roadster is $5k for 3 years.