In today’s tech environment, you have to be a fickle programmer to get yourself hired. With age however most people learn just the opposite - to be less fickle and more focused.

I think that the current complaints about age-discrimination, apparent and false though they may be, indicate a misguided but passing phase that the industry is going through. People are hedging with trivial ideas and products, hoping they will stick. These guys built a CAD product on the cloud called Onshape, check out their engineering team - https://www.onshape.com/team