As someone who casually browses articles about DRM technology, I'm really impressed by the partial descriptions of Denuvo's method. They seem to have found a way to thwart piracy (for some large value of thwart) without disrupting the user's experience in any observable way (no phoning home and no expensive game-loop calculations.) They haven't released many details about the system, but the little bits that analysts have been able to piece together are really clever.