aaaahhhh, I'll be paying attention to this one....
Hears my take, Its a machine, 10 year old motor with 200 hours on it has a lot of shelf time. rust in the heads, dry seals and gaskets... moisture, bird nests, what ever... if properly maintained, I know several folks with several thousand hours 2,000 and one fella pushing 4K, on their Yamahas and they still operate great and are still "Turn the key reliability" good!
there will be a lot to disagree with me, but I want something that has been maintained properly on a regular basis and used responsibly. 2 cents.