A while ago now, when they were still working out what sort of laser support they wanted. It’s not a matter of want, but a matter of priorities and dollars.
The number of Duet users I stand to gain from adding support for that controller is substantially smaller than the number of users I stand to gain by completing support for TopWisdom, Puhan, or other DSP controllers, and those licenses sell for a higher price. It’ll happen, it’s just going to be as I have time.