To me a person becomes a pleb when starting their Bitcoin journey. Kind of like an apprentice. They have a lot of work to put in learning about many factors within the Bitcoin ecosystem. I don’t think there is any graduation ceremony, journeyman status, or anything that can make a person no longer a pleb. As a pleb I believe you start to educate yourself on the discipline of learning and furthering your knowledge, so maybe one day a person could reach master pleb status?