Change is good. And in fact unavoidable.
A stage play requires very different craft from a book, fiction or otherwise, and ditto from a screenplay.
You can't leave civilization behind entirely.
From dear, dear Gloria Swanson, I learned how to live long, happy and free of health problems. I owe her my life.
The space genre is timeless.
I have written two nonfiction books, I'm embarrassed to say.