alt Hacker NewsI meant the userland specifically. By calling what is fundamentally a GNU system running on a different kernel just "linux" it makes people think linux and his crew made all of the userland, in part because saying a college student made "an entire operating system" is far more profitable for news agencies than acknowledging his important but overall relatively small role in what they call "linux"
Because the kernel is the irreplaceable piece. None of what GNU did is: there are numerous implementations of coreutils and shells and at least one non-GNU production-quality compiler toolchain (clang-llvm), a few alternative libcs. And many distribution do actively use the non-GNU parts. But none of this is useful without the kernel that is compatible with computers people have. And the only usable kernel we have is Linux (while BSDs are out there too, they take a much different tightly-integrated approach to userspace).