I am 55. I expected to be replaced by less expensive remote developers decades ago. I'm still not 100% certain why it hasn't happened. I feel incredibly lucky

I am 55. I expected to be replaced by less expensive remote developers decades ago. I'm still not 100% certain why it hasn't happened. I feel incredibly lucky that I get paid quite well to do something that is reasonably fun. Which gets me through the days that really suck, like meetings. I would love to find a way to retire and keep programming for something more useful. Do any charities need programming work? I ponder teaching sometimes, but I am not great with kids.