Cape Air is catering to over 65 with some type of "Silver (or maybe Grey) Eagles program. Many fractionals and 135's are scooping up over 65 because they can't get enough younger pilots. Not so much at NetJets and FlexJet but the smaller companies with less pay and benefits.
At NetJets I flew with some great over 65 pilots. But a percentage of them don't stick around when the reality of having to load bags, stock the jet, and clean the jet hits them.