I'm not a fan of SUVs generally, at least not as private vehicles for ordinary use. It's not that I don't see their utility in certain contexts, but the same can be said of SCUBA gear. If you want to wear an air tank around town as a Cousteau-chic fashion statement, fine. You'll look silly. But if you wear it on a crowded elevator, you can expect to annoy people. Likewise oversize vehicles that take up more parking space than is warranted, with high suspensions that make even your low-beam headlights shine down directly into the eyes of drives of smaller vehicles. (This latter problem is made worse by following too close.) But I'll grant that it's true that the higher wheel base does make it possible in principle to go through deeper snow than I can safely manage in my sanely sized car.
Last winter, an SUV got stuck in the lane behind our house, and when we went out to help dig it free, it became clear how the driver's confused thinking about snow caused the problem in the first place: he seemed to think that more power was the solution. To be fair, it's not necessarily a completely stupid idea; if you think of snow as creating more resistance to the movement of the vehicle, then greater force to overcome that resistance is a natural inference.
Of course, snow doesn't just create more resistance; it also decreases traction, and this is usually the bigger problem. Indeed, ordinary small cars like mine have more than enough power to get through even fairly deep snow, provided the tires can firmly grip a solid surface underneath. So one of the tricks to driving in snow is to manage the surface under the tires. Be aware of the effect your wheels are having on the snow, and use it to your advantage.
An example: Last night, I had to drive to pick up my son at the home of a classmate, which was in a residential neighbourhood where the snow had piled up, especially along the curb where I would normally have parked. I parked in the snowdrift anyway, and had no trouble extricating myself. Here's how I did it.
First, I approached with just enough power to keep me moving forward into the snow drift, relying primarily on my vehicle's momentum to get me to the parking spot. I was careful to keep the wheels rolling through the snow, not spinning free but maintaining firm contact with the snow underneath. Like a rolling pin going over pie dough, the wheels compressed the snow into a firm track under the tires. I let the snow itself bring me to a halt, not using the brake at all, so that the tires never scraped the snow beneath. Spinning or sliding tires will polish the snow underneath them into slippery ice, so avoid that at all costs.
Then, when it was time to leave, I knew that there was lots of deep snow ahead of me, and the front of my tires were right up against it. To try to drive straight out, as I would in summer, would require enough traction not just to accelerate the mass of the car but also to overcome the resistance of that snow. However, the way I rolled gently to a stop in the snowdrift meant that there was a flat track of compressed (but not polished slippery!) snow under and behind my wheels. So, I very gently backed up in that track until I had enough room to build up the momentum to roll through the deeper snow and out into the main thoroughfare. And that was that.
So, to put it another way, the lesson is this: Do not treat the snow as an enemy to be overcome with force. Treat it gently with your tires, so that it becomes your ally.