This leak isn't "stolen IP". At best, the leak might constitute infringement, which is not theft by any measure. We won't even know whether it infringes or no

This leak isn't "stolen IP". At best, the leak might constitute infringement, which is not theft by any measure. We won't even know whether it infringes or not if and until it goes to trial, and a judgement is rendered. You can't inspect for infringement, it must be determined at trial. Even the idea of "Intellectual property" (assuming that's what you meant by "IP") is a bit suspect. Although this leak probably (but not certainly, see above) constitutes copyright infringement, lots of independent invention goes on, far more than the "IP" people want to admit. The "property" part of "IP" is on very weak moral grounds, as in the US, the grant of a state-sponsored monopoly on seom material is only in effect to give a larger public domain for later common use. So it would appear to not be "plain and simple", but rather extremely murky and costly to figure out, so nobody can use the leak without a lot of consideration.