My aerial work/ part.SPO employer has had an AOC for a while now. Works well, CAA FOI appears content with what he sees and I'm certainly delighted that I get to actually operate (ie hands on controls for up to 5 hours/day, as opposed to watching a student do it (arguably better than I'll ever be able)). You can see my age from the ever-updating box on the left-hand side; age 60 is no barrier in this job. Fortunately for me, Handy, a complete inability to understand logic also fails to hold me back! (I do agree with you, though)