What Could Run the World Instead of "Linux"
As noted this morning in Australia, on the 19th of April 1993 the first release of NetBSD came out. That's nearly a decade after the initial announcement of GNU but not the first release of GNU.
Had it not been for GNU (the software, the licence, the compiler GCC), we'd probably not have Linux and perhaps BSD would be more widespread (no copyleft, so expect proprietary derivatives). █
Image source: thyme