If we had -8C for weeks every winter, UK GA would grind to a halt, because in most places hangarage is scarce (and costs say £500/month when you can get it) and one cannot usually park the car close enough to the plane to unload heavy equipment.
We would have to get seriously sorted, but most owners would still be grounded because they simply don't have a solution to pre-heating the whole plane.
The Americans have it easy. At most places, they can drive right up to their plane, unload stuff, etc. They have fantastic FBO facilities, with warm rooms, showers even, and even courtesy cars which are sometimes free.