It's not so much that the DRM was broken, rather that we finally have the complete image of the program that's responsible for the CD drive and AP, which admittedly we didn't have before. We knew more or less how it worked and found ways to trick or bypass it, but now we actually have the ROM, which helps a bunch. The DRM wasn't really "broken". There's no backdoor there, just an exploit - we still can't burn that ring and squiggle and likely we never will be able to actually break the protection, but just knowing the full CD protocol is a great help in emulation and future ODDE development.