The ML folks have sworn off working on higher end cameras (1DX and similar) because of thinly veiled legal threats from Canon, although I'd personally be concerned about bricking a camera that expensive.
Which is total BS and allows Canon to drag their feet to add features that the cameras are completely capable of. It's kind of a joke that a camera can do complex things yet the only thing holding it back are firmware updates. Canon could even charge for say a "film" firmware for their DSLR cameras to enable these features, disable AGM, etc. But they have to protect their film cameras that even still miss features ML brings to the table.