With all due respect, I think this is meaningless in our cases. I absolutely buy it in general, after all, if you 'make' money on buying a warranty that means, by definition, the dealer is losing money and your insurer will go out of business. So of course you 'lose' buying warranties--you want to lose or there will be no insurer there if you need them.
But in THIS case, a new car, new technology, no telling for how long it'll be supported, if and when there will ever be aftermarket parts, all that--in the classic words of a quibbler, I think this is different. Maryland is giving me a $1,700 tax credit, I think in this one unusual case I'm going to bite the bullet and turn that into the 8 year, 120K warranty. This helps even for the first 3 years; I don't have to worry about squeaking out the miles for those three years.
In this case with all the rebates I've been given, it just seems like a no-brainer to invest a few of them back into sleep-at-night security.