Looking at the tags, it seems like you are talking about “perpetual student” in the narrow sense of “academic”. I know a lot of people who sign up for classes after they graduate, formal or not. I’m a “perpetual student” as well, as I’m learning for my Master.
I’m thinking of the term in a broader way though. You can get out of school and never go back again, but it doesn’t mean you have to stop learning new things altogether. I think this is where a lot of people fail. They can’t learn anything outside a class setting. Self-learning requires a lot of curiosity and discipline.