According to the same wiki article, the hierarchical version you mention of Euclidean Zoning (named after Euclid, Ohio) fell out of favor in the US for flat zoning, which is much more restrictive. But since it’s always locality dictated, it’s always different wherever you go.
In addition to Aezora’s response, extrovert vs introvert being a description of your attitude to socializing is only a colloquial use of the term. I am a shy extrovert. I do not get social energy by being alone, like an introvert does, and I have problems talking with new people and even with friends prefer a back seat in the conversation.
Most people seem to fit into more clear buckets, if you believe the marketing, but that doesn’t make the buckets the definition.