Don’t get me wrong, I am a huge Ubuntu fan. I have only tried a few Linux distro’s and have only spent more than a few hours in Ubuntu, but its accessiblity and easy of use are far superior to any of the other that I have tried.
That said, accessiblity and ease of use are relative. I am prepared to spend several hours trouble shooting some configuration files just to accomplish a simple task because its what I do and I enjoy it. Everyday mainstream users are not. They want something that just works without tweaking and customizing.
The reason that I bring this up is I just upgraded from Ubuntu release 9.04 to 9.10. This should have been a fairly simple upgrade and for the most part it was. However, my sound broke. Yes its not much but having working sounds is elemental to a computing experience. Until various Linux distro’s can standardize enough to minimize these sorts of things, Linux market share will remain minimal.