I spent two winters in Iowa (colder than your New England winters but less snow and more wind) and batteries do lose energy in the cold. My little Dodge Colt had a hard time starting even in my garage. I think you are missing two key points though!

1) Batteries warm up when being charged. I solved my hard starts by trickle charging my battery at night. Since EVs will be charging at night.(and possibly during the day at charging stations)....problem solved. (Also, the postal service used a pre-heater in the old Postal EVs to warm them up using "shore power" before use. I also know that many northerners have remote starters on their ICE cars for just this purpose.)

2) We have also heard - countless times - about the batteries getting hot while discharging. Some of this heat could be diverted to the cabin (kinda like those crafty Germans did with the air ducts around the old VW Beetle air cooled engines!).

I think the whole cold weather thing is a wet paper bag we need to get out of.

The show is great. Haven't missed one yet. Bo, Have a blast out west and have fun driving that Tesla! Of course the non-disclosure agreement won't let you say anything but "WOW that was wicked awesome!". LOL