GNUStep is still being developed, much to my amazement, but somewhat slowly. Back in 2002-2003, it was actually in use for some commercial development, too, so

GNUStep is still being developed, much to my amazement, but somewhat slowly. Back in 2002-2003, it was actually in use for some commercial development, too, so it's not like it's a long-abandoned turd. But the development rate is fairly slow and many applications that use it haven't been updated in a while. I expect it will be all but dead in the 3-5 years it will take the lovely members of the Linux Foundation to push Wayland everywhere. The biggest hurdles to GNUstep's adoption were a) its lack of documentation (you were generally expected to use the NeXTStep documentation, although some functions were not implemented at all and others were slightly buggy) and b) the fact that Gorm and ProjectManager were really buggy for a really long time. This made GNUStep development not significantly more pleasant than GTK or Qt development -- not to mention difficult to get into for people who had never written NeXT or OpenStep software before.