Lots of valid opinions. I too think for what you describe, the all-seasons are the best way to go. Surely, performance will not match the performance tires, but then, as you describe it, you're not trying to any turn fast laps.
Even with the M/S tires, and snow depth aside, the compunds used may not perform well in extremely cold weather. In moderately cold weather, you want to take it easy til the tires warm up, maybe 5-10 miles in Il temps.
Another issue, or compromise, will probably be tire width. A wider tire, even with a larger contact patch, is likely to have less grip in cold weather, especially on any snow patches. The skinnier the tire, the more weight/inē on the contact patch which will translate to better grip, same in the rain, though less pronounced.
You may only drive on sunny winter days, but hard tires from the cold will offer much less grip. You might consider a set of winter tires - they'll be run fewer miles and so will last several seasons. It's an added expense, but everything being talked about here is a compromise of one sort or another.
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