Why Not Dylan?

Dylan's greatest weakness is the lack of commercial-quality compilers, especially on the Macintosh. Apple has refused to comment on the future of their technology release, and functional Objects is targeting the Windows and Linux markets with their compiler. The Gwydion Project 's Dylan implementation will support multiple UNIXs, Windows, and Macintosh when complete.

Even when good Dylan environments become available, experience suggests that Dylan applications will use more RAM than programs written in traditional languages.