Ex-Boston driver. Another vote for Nokian Hakkapollittas (from Finland), first R2s and then R8s. Used them from winter 2013 through winter 2016 on a 2013 Model S P85+, then on my P100D from winter 2016 until now. I like driving in snow and these tires have been great for me in snow, ice and low temps (Boston-style low, not Antarctic-style low).
Now, living in the Washington, DC area, I continue to swap summer and winter (Hakka) tires for my S. But for my P3D, I've been convinced to rotate between summer performance tires and all-season (Michelin) the rest of the time. For my parent's Jan '18 RWD 3, I'm just sticking with the OEM all seasons.
It's hard for me to imagine optimizing for winter driving on clear roads with low temps. At some point, you'd think you'd want to be able to deal with snow and ice.
Alan
P.S. In Boston, on unplowed roads and in my driveway, I was dealing with up to maybe a foot of snow... sometimes to the point that I would raise the air suspension to Very High. Wow, that was all a ton of fun!
I miss all that here in the DC area. :-( I added this comment in response to the observation from Orizu that his experience was maybe a challenge because of a couple inches of snow.