There are several large legwear manufacturing and marketing companies within a 20 mile radius of me that would be shocked to learn of this.
Skintone sheer hosiery has been declining for decades but very few women are willing to go bare legged, especially in cooler weather. It’s easily a billion dollar industry and rumors of its death are greatly exaggerated.
Nope. Even in cold weather nylons are not worn. They’re out of style. Older women wear them..... Tights are another story.