To a considerable extent Kodachrome can be considered a "test case" regarding film as a niche market. While it's usage has dwindled considerably from its hey day - it retains a small, loyal following that apparently generates enough demand to convince Kodak to keep making it. Which in turn creates demand for Dwayne's to keep processing it.
Still, much as I loved it once, and still think its a great film, I've moved onto other products. I now favor Velvia for chromes and also shoot much more print film than I ever did before. But I'll always retain a fondness for K-chrome!