Frank I agree 100%, I am 74 years old and I have learned things a bit more complicated than flying a plane in my life. And after semi retiring I went on to teach and head a program at our local community college. It may take me a bit longer to learn these days but so what? I can use a computer better than my grand daughters, design in Fusion 360, run my CNC machines and 3D printer build stuff in my home machine/fab shop and so on. Not ready for the retirement village yet! Yet I did just sell my off road dune buggy, making room for maybe a air craft build??