Obviously everyone is interested in things, but it is a matter of degree. Being extremely deeply passionate about something, especially if it is something really unpopular and obscure but complex and time consuming that has no real social or other benefits, is not common among neurotypical people. However, for example, I have ADHD and hyperfocus on niche hobbies and interests where I can barely think about anything else, sometimes for months.
From my observations, most extroverted and otherwise neurotypical people don't have obsessive interests they pursue deeply entirely on their own. When they have hobbies they enjoy a lot it is often the social community around the hobby as much as anything else that is motivating them to stick with the hobby.
From my observations, most extroverted and otherwise neurotypical people don't have obsessive interests they pursue deeply entirely on their own. When they have hobbies they enjoy a lot it is often the social community around the hobby as much as anything else that is motivating them to stick with the hobby.