In the U.S. we do, sometimes, and some kinds of cotton quilts are a kind of cherished folk art.
However, they are heavy, and a little hard to clean
For simple warmth, nowadays, we are much more likely to buy synthetic "fleece" blankets, which are warm, light, very cheap, and easy to clean, or "down comforters" (quilts containing duck feathers) which are expensive but worth it--they are about the warmest, lightest, and most wonderfully comfortable covers in the world.
It seems like a market analysis. " Just give me the numbers , what is the demand for cotton quilts by countries" :)
In Turkey we use cotton quilts, I can't give you numbers but in rural parts of country people use quilts that are filled with wool.