> Where does one draw the line between magic and a lack of user understanding?

There is no line; that's the definition. (I'm agreeing with you here, btw) It's a blub issue; if one doesn't understand it, it's derisively called "magic". So you don't get this argument because it's totally based on the observer.

I use Django at work and I hate it because it's magic all over the place. And I recognize that me saying it is simply I haven't had the time or impetus to go figure out the stuff I don't have figured out yet, so I can bucketize all that as "magic".