Then what is the difference between GNU and GNU/Linux? If replacing
the kernel is (almost) not noticible for the user, why does it matter
that we use the Hurd, Linux, the BSD kernel or even the Solaris
kernel?If the Hurd provides more power and/or better security, that won't directly change the user experience. However, programmers and sysadmins will take advantage of them, and the result will be better user experience too.
