I have a bike for the street, and a bike for the dirt.
Both are well suited for what I do with them, what I enjoy doing with them, and are smart picks for my age.
One bike just does not work for me, I want something really light in the dirt, with good suspension, and on the street, I want something light, nimble, comfortable, and that I can ride hard without getting in trouble.
A DR650 would have worked well when I was younger and my bones were less brittle. I think I would have got in plenty of trouble on one though.