Cool and nice, and I've seen, over more than ten years of working with servers, loads where Linuxes died and Solaris/OpenSolaris boxes just happily worked on what they were given.
What makes me wonder is, how all of comments in this thread I've seen look just like typical trolls. So you're happy with your Linux boxes. Cool, I'm happy with my Linux boxes too. But I'm also very happy with my illumos boxes. While Alasdair choose pretty poor way of putting it, he is right in many aspects.
Also, while I believe Linux is going to have equivalent of DTrace one day, and of ZFS (and maybe even ports of them), I am using them right now, stable, fully productive, with no strings attached to Oracle whimsical view on community. Go figure.