I know...and I probably wouldn't take an alcohol stove as my primary cooking stove for winter camping because of that.

Being able to make an alcohol stove that will melt snow would be handy for a car kit. For a large part of the year I can't keep liquid water in my car, but I can always keep alcohol. Also, even though alcohol has half the energy of white gas or kerosene, it would still be less weight than the snow it could melt.

Did you mean -10/-15C? That is pretty cold, and I probably wouldn't want to be out camping in it, at least not with that being the daytime temps. Even in January, daytime temps here are usually above 0F (-17C). If you meant +10/15C, well that would be the average winter indoor temp at my place. If you visit you might want to bring a sweater.