I am 66 and semi retired, build a few performance engines to keep from being bored. I can do most of the head work in house, I have two machine shops that I farm out the rest, both are my age, one has health problems. When they are gone I will have to be gone nobody else close to do the work. I have more to do than I want at this point in my life. So yes as the baby boomer generation retires who will take over? For a lot of traditional jobs nobody.