I beg, respectfully, to differ! It's a lot of fun to go out in the snow and ice... with the right equipment. My choice is a mountain bike with studded tires (Nokian "Extreme 294" if anyone is interested). I'm 67, so I'm not riding through deep powder, but rides on quiet, snowy trails are a lot more fun without worrying about ice under the snow. Even more fun is riding on frozen lakes, provided conditions are safe.
Steve