I commute by public transport, and I mostly read books on a Kindle. If I was to use my phone, I'll probably solve sudoku or something. Or maybe read RSSes.
For me it is (unrealistic). Every update is fear that something will break. Vim, kmail, even gtk themes. You don't know the day or the hour.
At least that's how it is for me. I know many people who have no problems with updates breaking stuff in Arch; maybe it's the fact that I'm using a full-blown KDE instead of a mere xmonad or such. But I wouldn't recommend Arch to anyone who expects stuff to work.