I remember having a discussion about this issue a while back and a member (can't remember his name) had said that the angle of the windscreen had a bearing on why condensation readily formed on it. Also some talk about the cleanliness of the interior glass. I was told that minute particles of dirt, grease etc on the glass was ideal for moisture to condensate around. As it was, I have since kept my interior glass very clean, use glass cleaner every couple of weeks. and when time & weather permits, I leave a the windows cracked open a bit to get airflow through the car when it's sitting on the drive and I can report that although I still do get a bit more condensation than in other cars I have owned (about 25 or so), it is not a real problem anymore. For me, I'd say keep the interior as dry and as well aired as possible is the best way forward. Once damp gets into the seats and carpets during the winter, they will hold that moisture and slowly release it into the car's interior until the Spring.
It may be an idea to look back 2-4 years and see if these discussions are still here.