Even more than fashion I think weight and cost were the big issues.

Even today, Cosina Voigtlander has produced the Nokton 50 1.5 lens (and maybe others) in chrome and black versions. And I have read several comments from people how the chromed version is wayy too heavy and they want the lighter, black version instead. And the chromed version is quite a bit more expensive for the same lens. A good chrome job costs money!