One thing that would help bring back building is to support those who supply you with what you need in your hobby. The reason kits have dwindled is because they ain't selling. Some of us have been trying to keep various kits alive and design new stuff but from my experience it is a labor of love and not a money making venture. I do it because it is part of how my hobby has developed and it is what I enjoy. ARF's are the bulk of the market because they are selling and able to make money for the manufacturer/distributor and retailer involved. It has nothing to do with which is most pure. The kit business has been voted out of popularity. Only you can bring it back.