In the summer I can make it from home to our place in Truckee without stopping (either my wife's X or my Y). As it gets colder, that becomes less possible and I often stop at the Loomis location anyway for a quick bathroom break and 10 minutes of top-up. This new location might be nice for when I think I'll likely make it but I need a bail out location if I use more than I expect. The big question, as above, is whether it'll be cleared in winter when I actually need it.
A story related to that. In the winter of 2016 (I believe), we hadn't yet purchased our place so we had rented a house in Tahoe Donner for a long weekend and were headed up there in our 2016 Model X. There was a winter storm blowing in, and when we reached Colfax, they'd closed 80. Having "go fever," we decided to wait in Colfax with a couple of young kids, then decided to drive back down to the bowling alley in Auburn (where there is ironically now a Tesla Supercharger location). We threw some balls, drove back up to Colfax, found it was still closed with a lot of waiting, then drove back down to Auburn for pizza. Midway through eating, we got the notification that 80 was open. I did some quick calculations and decided that we could make it without driving back to the closest charger at the time (Rocklin) and back up the hill.
About an hour later, we were stopped on 80 in whiteout conditions. Despite not moving, obviously our battery was draining from keeping the pack warm. I had the seat heaters on, all other heat off. We had blankets thankfully, but I just kept watching my SOC drop as we sat still, wondering how a tow truck was going to get us in the middle of a snow banked interstate. We started moving and I was constantly calculating whether we'd make it over Donner Summit. The windshield was completely frozen and iced. I had to stick my head out of the side window to see enough to move forward (we were crawling anyway). We did make it over the pass, IIRC our SOC was 1%, and plugging into the Supercharger in Truckee was one of the most relieving things I've ever felt. After charging, we went to the rental to find it was a long, steep driveway that obviously hadn't been plowed. It was after midnight, I walked up and opened the garage and started shoveling. I believe I got inside at about 1am.
It was one of my three bad "state of charge" experiences in a Tesla. Probably the worst just because of conditions.