It is interesting, very interesting actually.
I had been skiing before I started snowboarding and was quite good at it and I usually ride one day in the season on skis, for the last few years carving skis and I quite like it and although I can ski pretty good with carving skis I always regret taking skis instead of the snowboard. But I force myself to ski, because I enjoy it in a way and I think it would have been a pity to forget how to ski.
People, who never stood on the snowboard always go on about how carving skis are great, how they glide and that exhilarating feeling of the carved turn...
However, as they don't know the feeling of a turn, carved on the snowboard, or even less the extremecarved turn

, I like to say to them that I experienced that feeling years before carving skis were invented and that the feeling they are describing is a couple of times more intense on the snowboard
And that's really it - I like skiing and I ski occasionally and when it's crowded skiing is probably indeed an alternative to be thought over, but I would never replace skis with snowboard, it's simply so much more fun.
Oh, and I would almost forget about my opinion about relationship between skiing and snowboarding. Yes, I also think riding an alpine snowboard can help you a lot by skiing (carving ski), especially the movement, feeling for the carve... I guess it works the other way around too, my friend could ride a board in seconds

and he is a very good skier. Or he's just talented...
Bye,
Jakob
Element - water.