GNU was the very first free Unix reimplementation project. Without it, maybe only excessively expensive commercial Unix systems would be available alongside Windows. Although 386BSD was also an early effort, the intense FUD campaign prevented it from being used for more serious purposes. At the time, GNU/Linux played a crucial role in competing against commercial Unix systems.
urgenthexagon
joined 1 year ago
Mull is pretty much the same thing for Android.
Have you ever heard of NASA's DC-X? It was a working reusable launch vehicle prototype in the 90s based on the same concept. Often, when someone talks about SpaceX, it seems like they're not even interested in launch vehicle development. The DC-X was a well-known project.