The Z is a car and can be driven in winter conditions like any other RWD car. It has limits with ground clearance etc. Like any other. Some days will not be good for it and when its that bad, it might not be good to be in any car to begin with.
My neighbor drives his 911GT3-RS 4.0 in any weather. I asked him about that. With a firm and smiling look - he responded, its a car!
I love the German attitude about winter and driving!