As with most other things, it depends on the person. I have a suspicion, for instance, that your definition of "day to day basis" is very different than mine.

As with most other things, it depends on the person. I have a suspicion, for instance, that your definition of "day to day basis" is very different than mine. The majority of my time on my computers is spent in a screen session in a terminal. In such a setting, Linux passes both Windows[1] and OS X[2] fairly easily (in my eyes). I'm not going to pretend that this is anything like what most people would do with their computers. But it's what I do with mine, and it's plenty for me. It's also why I don't understand debates about "the year of Linux on the desktop" - I don't really care if it is accessible to or useful for people other than me, so long as it meets my needs, and it meets my needs quite nicely. [1] I know there's Cygwin, but even after that you still don't have a package manager. [2] I know it's a Unix, but even after that you still don't have a package manager. It has, e.g. Macports and Fink, but I've never had much success with either (although I'll concede I haven't made much of an effort).