I have a just shy of 20 year shingle roof. I was offered by an adjuster after Michael to get it replaced. We got no damage and it seemed a waste since there's at least 10 years left on the shingles, I'm not missing one shingle, have no warping or soft spots on my underlayment and frankly don't need a new roof. For that honesty our insurance company dropped us, left the state and only citizens will cover us reasonably without replacing the roof.
Trying to decide whether to do a metal roof or shingle with ten year shingles since anything longer seems pointless.