Cars, perhaps. For another recent historical example see: smoking. Personally I'm waiting for when sitting at the desk all day long is found out to be Very Ba

Cars, perhaps. For another recent historical example see: smoking. Personally I'm waiting for when sitting at the desk all day long is found out to be Very Bad. But that's probably just a modern ‘proletariat vs capitalist’ issue—I guess factory assembly lines weren't and aren't too popular either.