I have personally been around to several houses and hardly any of them have bed canopies. So based off personal experience, I would say no they are not.
bed canopies can work with mission style decor provided you follow the simple rules of clean lines, high quality material and good workmanship. Lighter colors also work well for this style.
Well, it depends on your age. If you are in your teens, jeans with rips are in, nerd glasses with NO lens, wavy hair, and a tank top with a plaid button up, tied together. if you are an older woman,...
the canopy is attached to the four posts of the bed and the four top rails by a wire or with four simple hooks one in each corner off the the four poster bed
Canopies are generally bought just for decorative appeal. In some countries canopies are used as protection against insects, especially disease caring mosquitoes, while they are asleep.
You can buy inexpensive bed canopies from sites like Ebay or Amazon. You can especially obtain a great deal on Ebay since you can bid on fairly low prices.