I am 82 years old. I imagine that I will keep on writing as long as anyone wants to keep reading.
How can you stop writing?
You write for two people, yourself and your audience, who are usually better educated and at least as smart.
I know what I write about seems exotic to a lot of people, but not for me. I pulled up to an old trading post and saw a few elderly Navajos sitting on a bench. I felt right at home.
The first Chapter Law is, "Don't spend much time on it. You're going to have to rewrite it."