Also worth mentioning (is pedantry part of perfectionism?) that in addition to the definition of a disorder as when something is adversely affecting your life,

Also worth mentioning (is pedantry part of perfectionism?) that in addition to the definition of a disorder as when something is adversely affecting your life, is if it affects other people's lives or the society around you. So some disorders may not affect your own life directly, but they do affect others, or they do affect the society. Societies and cultures change and as so some behaviours become acceptable, this leads their re-classification away from a disorder.