The selling point of various GNU userland tools and libraries in the 80's was better performance, removal of obscure bugs and limitations and then maybe some us

The selling point of various GNU userland tools and libraries in the 80's was better performance, removal of obscure bugs and limitations and then maybe some useful extensions. Case in point is that most people have no idea of how POSIX defines "text file" (ie. ends with \n, no line is longer than LINE_MAX), and what happens when you inout something that technically is not text file into POSIX utility that expects text file is undefined. GNU tools do something sensible or at least produce an meaningful error message, traditional Unix userspace usually does not (lines get truncated, last line sillently ignored, some buffer somewhere overflows and in better case you get SIGSEGV...).