With age you can become more effective! As a 64 year old Developer I tell clients that my USP is 'grey hair'. Younger developers may produce slicker code and better SQL structures - but having run businesses I can look at the requirements from a Directors/Owners point of view and guide them on how to get the most benefit for their organisation from the technology.

Not to mention avoiding organizational problems that younger developers will blithely lead them into?

Youngsters these days can't do SQL. Its all MongoDB and Node.

That's rubbish. I'm young and know SQL fairly well, it's still a very valuable skill. If you base your opinions of young developers on HN articles then that's your problem.