Happy Birthday, GNU/Linux

RMS sends his own characteristic birthday greetings to celebrate the marriage of GNU and Linux:

15 years have passed since the combination of GNU and Linux first made it possible to use a PC in freedom. During that time, we have come a long way. You can even buy a laptop with GNU/Linux preinstalled from more than one hardware vendor, although the systems they ship are not entirely free software. So what holds us back from total success?

(The answer, in case you were wondering, is "social inertia".)