There was an Interview with Antony Fountain, co-author of Volume 6B: Motif Reference Manual, 2nd Edition, by Lori Houston on O'Reilly's web site.

Despite the clamor surrounding Linux and the Open Source movement, author and leading X/Motif software developer Antony Fountain maintains that Motif remains the quiet vanguard of commercial software development for large-scale Unix applications. As the native toolkit for the X Window System, a graphical Unix programming interface, Motif continues to be supported by major workstation vendors such as Sun, Hewlett-Packard, and SGI.