If your looking for a car that doesn't slide on ice, well that doesn't exist, the 4x4 will help prevent getting stuck, I'm not sure if you were present in TX for the 2021 winter storm, (I've lived in dfw for 8 years and was in town at the time) i was driving an awd toyota at the time, but...
From all the testing I've seen, slippery doesn't affect traction control in the snow, rather reduces engine throttle response and lowers torque, I saw it in a video on a 21 bsbb, I tried to find the video again but I can't seem to, just drive careful, assume no one else knows how to drive, and...
I can't speak for op of that comment, though I have plans to do the same to mine and already have the parts, you can find them with the brand oracle lights, they are not made specifically for the bs though they are about as universal as they can get, just gotta know how to do some wiring, here...
I had a rattle behind the screen, during my time trying to locate it I decided to install a phone holder that required removing the hvac panel, where I inadvertently found said rattle, a bolt had come loose and was rattling around. I probably spent a solid 5 minutes giving that bolt the death...
I do believe they are trying to pull one over on you, I called my local ford and they quoted ~450 200 for hitch 240 or 250 for labor (I don't remember the exact number, this was about 2 months ago)
I suspect something battery specific, internal short? Resilience to low voltage situations? There are a number of reasons that could be leading to issues as coopny has explained in an excellent manner