I tried Nokian WR ("all weather") on both our van and my car a few years ago. They are impressively multi-function, but the traction in very cold weather and hard ice was just not good enough for me, and the wear was too fast on the van. I have front wheel drive (in both cases), but for me it is not about drive traction anyway - it is about stopping and turning.
I have returned to using two separate sets of tires - on dedicated sets of wheels - for each vehicle. In both cases, the summer and winter tires are not the same size (in each case the winters are one inch small wheel diameter, and 10 mm narrower section width).
I know people who commute very short distances to work, all in urban conditions, and they are quite happy with the Nokian WRs year-round. Since they drive so little they can afford to keep tires on with lots of tread (even though they wear fast in the summer), and their road conditions are rarely severe. I commute 75 km round-trip from a rural area, and I enjoy the better bare-road handling of summer (actually all-season) tires.