These machines have been around for a while. There are at least nine companies selling them.[1] This started in Australia and New Zealand, which don't have much cheap labor.
There's a competing approach - robotic rotary milking.[2] Rotary milkers (giant turntables with cows on them) have been around for decades, and are becoming more automated, down from four people to one.
All this stuff works fine. So there's a huge milk glut.
[1] https://roboticsbiz.com/top-9-best-robotic-milking-machines/
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