[stefl14]

Manufacturers mostly make black or white cars because that's what people want. Modern culture has made people so boringly conventional that there's no point in manufacturers painting on different colours, so they charge a premium or don't do it at all. Your explanation fails to explain why exactly the same trend is happening in fashion. Is there some conspiracy where clothing manufacturers are trying to restrict choice in clothing, too? At some point, you have to question the culture at large rather than individual industries.