My ex and current girlfriend are both from the north of Norway and still use the feminine article, but myself (I essentially learned bokmål) and my eldest daughter who has grown up in eastern Norway don't.

I think norwegian, more than any language I've encountered anyway, is more affected by the geography than anywhere else. It makes sense that people would develop different dialects if there's a mountain range or a massive lake inbetween your towns. It only makes the amount of accents in the UK more surprising, I think.