I thought it was a bit odd that he wrote 7 paragraphs about music equipment and software, but didn't mention which GNU/Linux distribution(s) he uses on his "junky" laptops.
The code you get out of your coding session, or the LaTeX source for your book, does not really depend on which method you chose to install and update GNU/Linux.
Am I being naive here?
Musicians call it GAS, Gear Acquisition Syndrome, e.g. I've got major GAS for an Ampeg amp.
But, to answer your question, I use nearly every OS there is: Linux (Arch, Ubuntu, Debian, Fedora), NetBSD, FreeBSD, OSX, and Windows. I have to use all of these to test different things on various projects. As I get more into writing books though this narrows down to Ubuntu, OSX, and ArchLinux.