Most of what I'm reading here "it seems" are not Tesla or Model 3 specific issues. Many modern cars now have to drop the window slightly to open the door and thus have the same issues. A quick read across forums or a google search reveals that.
Recessed handles similar in design to those on M3 have been around for decades on various car models here and there, Heck my 1956 Desoto had handles where you had to press on one end to get the handle to come out to get hold of it to pull on it and it also had frameless glass the solution at that time was to allow the top window trim to swing out to clear the glass upon opening the door. Yes that had winter issues as well.
These problems are as old as cars and winter. Not sure why suddenly we expect Tesla's or M3 to be any different.
Yes, have an Audi A5 in Rhode Island. Last week, ice storm, unable to open the doors. ..next day was able to get in on passenger, sunny, side, and run the car for 30 minutes before being able to lower the drivers window enough to open the door.