I saw a perfect demonstration this morning of why I prefer a front wheel drive car.
I trudged across to the shops this morning in almost 30 cm of snow. The row of shops are in a one way service road where cars park in echelon on one side of the road.
This is a Google Earth image
The snow had been compacted by vehicles and it was very icy.
A BMW series 1 was trying to reverse back into the road to drive off - but he was going nowhere. Just the camber of the road was enough to stop the car from moving and the driver was spinning the rear wheels in his attempt to reverse.
There was a Hyundai i20 alongside him, the driver got into the car, reversed out and drove off without a problem, leaving the Beemer still struggling for grip.
Two guys at the bus stop walked over and pushed the BMW back until he was straight in the road - but when he engaged Ist gear he had great difficulty getting the car to move forward because the snow was rutted - so the guys went to the back of the car and gave him a push start. Meanwhile several vehicles further along had reversed out with no problem and were being held up by the struggling Beemer.
Rear wheel drive BMW's may be great on dry roads - but show them a bit of ice and they are useless.