Using an old version often isn’t feasible.<p>For example I lost sound support on my Gentoo OLPC because I had to update my Emacs to 24 to support my .emacs.d from my desktop without endless compatibility issues. Emacs 24 required a new udev, which required a new kernel version, which did not support the audiocard properly.<p>Result: No more hacking with music in the train for me.<p>@steve: Thank you for that article! I hadn’t seen it yet.