I'm leaning 'evacuate the place'. Though I don't actually know how much it would turn out to care about things developed with science elsewhere, if someone wanted to risk checking? It's - one way to model the world is, like... I know Companions don't go buy things in stores but I assume you know how it works, imagine you suddenly had finances to manage, okay, and someone wanted to sell you... horseshoes, fancy overpriced ones, and they decided to go about this by visiting you ten times a day, no matter what you were doing, and walking up to you and giving you an incredibly rehearsed spiel about why you should buy their horseshoes, and every time they changed exactly one thing about the speech, one word or how fast they're talking or the exact cadence of a sentence or how they gesture at the sample horseshoe, because they think if they do this exactly right, eventually you will give them money, and you can't convince them to stop. The idea is that the universe doesn't like this, and in fact hates it so much that by the second or third time someone walks up to it and says 'have I got a deal for you', it strikes them with lightning, so everybody knows better than to try. And if this model is the right one - it has never explained itself, this is guessing based on patterns of bad luck and so on - if that's the right model it might not mind at all if we invent a million things in universes that don't care, and export them. I was there for a moment, between Arda and here, and my magic things still work and I'm alive and everything, though maybe it just didn't have to deal with me long enough to get irritated.