I'm 64 and retired last year. I spent 4 decades programming, and everything changes all the time, and I always learned new things. I am still learning new things, and still writing code to support my generative art. Admittedly I was finally burned out of the grind of working as a programmer, but it took a whole lifetime. But to truly approach new things you have to be willing to let go of the old, even programming if necessary, but without forgetting what you learned. A lifetime is a long time; you really don't need to just do one thing the whole time.

A quote from a novel has always been an inspiration since I read it in high school - "An artist must leave a body of work" from The Agony And The Ecstasy, about Michelangelo. If your programming no longer excites you, learn something new in programming, or even learn something that isn't programming and do that. It's not easy, and might cost you money, but wasting your life doing something you no longer care about is not worth it.

Of course some people can deal with a terrible job, and just spend the non-working time doing what they love, and that's OK if you can deal with it. I could never do that; I didn't turn to art until the last few years.