Oh, sure. Since I already explain it to Sodium, I guess I'll post it here too.

My initial explanation was simple "Magic interferes with technology". But I guess that was as vague as I could get. Anyway, here we go.

So, in the world where Four Winds exist, magic functions as an expression of one's will. It's basically an ordering of causality in accordance with your consciousness. Technology (including mundane technology), functions through mechanisms for manipulating flows of electrons and operates according to atomic and quantum laws. So in this world, magic would take place not on an energetic level, but on a paradigmatic level. So the branch of science we're using wouldn't be physics, but information theory.

Consciousness is to the quantum realm as the quantum realm is to Newtonian mechanics. So the rules have a kind of fundamental presence (note how important "the observer" is to some quantum models), but the way they're expressed is radically weird and different from our perspective way up here in the macroscopic plane. So when magical consciousness-effects are present, they cause what amounts to interference on the level of electrons and photons. Living beings are relatively unaffected due to a certain level of self-awareness or what could be called "informational coherence." Inanimate objects, however - especially things with circuits, batteries, and whatnot - are going to be subject to the causality-equivalents of static, bands of interference, blips, crackles and the like. Hence, causing dysfunction of technology.

Makes sense? Even in the slightest? Please?