Didn’t read all posts, but from what I saw, there’s absolutely no way you’ll consider an AWD, and I don’t know why people are trying to convince you to do something out of your price range.
From everything I’ve read, researched, discussed with owners of the SR+ They all love the car (except those who have experienced the AWD or Perf) and think it’s super quick and fun.
the range meets your demands, and if you learn how to properly heat the batteries, you’ll be in a great position.
someone mentioned a 5 minute top up at a supercharger, I would argue, even 3 minutes just to warm the batteries in extreme conditions will get you home with range to spare.
don’t stop at a supercharger on the way to work as the battery won’t be in the sweet spot, only on the way home and it will be optimized. It might cost you 1$ depending on your local rates. And take about as long as fuelling up a gas car. (But you’ll be able to sit in your warm car while it’s happening, unlike a gas car)
Keep your tires at the right inflation, and check regularly (the car has a tire inflation page that shows the current pressure)
Don't exceed your 70mph speed you mentioned. On really cold days, keep a pair of driving gloves and just drop your interior temp a few degrees and use the seat heater if you plan not to stop and are worried.
if you used the guidance system on the return trip, the car will tell you if you need to slow down to make your destination (lots of warning I gather). The cars are smart.
Any chance of plugging in, even to a 110V at work? (While unnecessary, it can be piece of mind and help you warm the batteries)
Hope there was some useful stuff in my comment for you.
Cheers.
$42,000 car and you recommended wear gloves to stay warm so you can make it to your destination.
More range is no compromises.