@PermaSolarPotter @david_kehm @thordis there's a pretty big difference between, "people born at about the same time as you" and "people in a similar stage of life to you" vs "uselessly broad and arbitrary range of birth dates".
Like, people in your cohort at school, people in middle school vs highvschool vs at college vs working are all meaningful distinctions, but "was this person born just before or just after 1980" is meaningless.