vometia, there is NO excuse for the lack of facilities for magisters except "the game developers forgot to do sensible set design". There's no in-game logic which can rationalize it.
I suppose I've got used to game worlds giving us the "abridged version" of what would actually constitute the reality such a world. Which isn't to say I disagree with you, just that I've become used to saying a resigned "meh" and moving on.
Except for Oblivion's lack of toilets. I complained about that quite a lot, and eventually added quite a lot of toilets to my expanded castles mod.
