Recycling Fashion in Costume Dramas

Jane Austen World has a post on some of the clothes worn in the latest PBS Emma adaptation. Many of them were recycled from other period dramas. I'm big on recycling, but there are times when recycling doesn't  work. The 1940 Pride and Prejudice with Greer Garson used costumes that had been made for Gone With the Wind the previous year. I just can't picture Elizabeth Bennet walking around in a hooped skirt.