Several here run Aeros daily. I ran my series 1 as an only car, as did HarryF here for a while. One of our Series 4 owners runs his daily and has clocked up some serious miles too.
I found on my Aeros that the ground clearance was always a lot better than most folks thought - certainly easier than a ferrari or a porsche or my old Maserati 3200.
Aero on snow is no problem either in my rather limited experience, though powerful rear wheel drive cars and snow are really something that comes down to driver comfort with conditions.
Rain and leaks are an occupational hazard, but buy a later car and they are less frequent - my S4 didn't leak at all but my S1 was like a sieve. But yes think lotus elise rather than fabric landrover..
As said - -35C could throw up issues, but then the drivetrain is all BMW which has been tested in these conditions, so it's not as if it would be completely impossible.
Apart from that there are owners in the Nordics using their Aeros and trads for a lot of the year, but maybe not in the worst weather.
There are more folks who will be along to comment shortly I'm sure who are using their cars everyday. I'm not using my 'max enough these days..
