@whot Yeah, I wouldn't want to go back further either. At that point, I think you start getting into weird history artifacts from the conversion from CVS...
@Conan_Kudo It was Xfree86 and renamed to Xorg after the split. I don't know when the X symlink appeared first though. A quick git grep dates the Xorg binary name to at least 2005 when autotools was added. Forgive me for not spelunking further :)
@Conan_Kudo@whot I believe the /usr/bin/X symlink predates both Xorg and XFree86 and goes back to the versions from the 80’s, before loadable modules, when you’d link to the Xserver with the right DDX for your workstation (Xsun, Xdec, Xhp, etc)