They were pricey to begin with, early versions could only seat 6 pax, the later 2000 could seat 8. While pretty and innovative in terms of design and materials they were not all that practical. Planes like the Super King Air or any number of light business jets could do all that the Starship could do, and more, for often less.
Because of the relatively small production of these planes, 53, Raytheon decided that it was too costly to continue to support them. So they have bought back most of the airframes and are in the process of scraping them.
However there is an admirable grassroots movement to save a few remaining flyable frames and support them as far into the future as possible.
Stop drop and roll will not save you in hell. --- seen on a church marque in rural Virginia