2022 M3 LR, same. Updated recently to 2022.4.5, no change. Sometimes the sun is on that side, but just as often not. Cold still here (Northern MN). Typically in the 20's (F) in garage, single-digit above/below outside. Every time I've bothered to stop & check there's a fog on the pillar cameras. Short of a sealed inert-gas enclosure, I assume that will just always be the case. And obviously a lot of the time the backup camera is snowed in, so useless. I get the "Multiple Cameras and Sensors blocked.." warnings daily. Of course; expected no less in this climate.
I kinda assumed already that in the brave new Tesla-Vision world FSD and AP would be sacrificed for non-perfect-weather, esp. in a world of snow-obscured roads. But for all it's phantom-obstruction warnings and camera failures, it remains head&shoulders the most efficient vehicle available here, so that's my requirement met. Yeah, I have to put with with probably $10k of annoying and unreliable e-clutter of AP/FSD/cameras/phantom-alerts. I can deal.