Why not? I work as a freelance software consultant, and I just switch between working on other people's projects and working on my own projects as needed. I don

Why not? I work as a freelance software consultant, and I just switch between working on other people's projects and working on my own projects as needed. I don't have any plans to stop this anytime soon. Maybe as I get older I'll change the ratio of consulting/not-consulting to provide for a family, or I'll find some other way to generate money and stop working as a consultant, but I really see no reason not to just do this indefinitely.