From a statistical standpoint, it's a waste of money. If you were likely to get your money's worth out of it, Yamaha would just raise the price again until they are making a profit.
That said, if you pay say, $800 now, that's the most you'll ever have to spend for a part failure or defect over the next 5 years. Would you rather lose a guaranteed $800, or not pay anything now and maybe lose $2000?
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