Even worse, they took CUE and created their own dialect while retaining the file extension. Their files are no longer valid CUE (if you use their "std" library and maybe some other things). Then they go on to say you're better off not knowing CUE, which I suspect will bite them in the arse.
I'd recommend thinking long and hard before considering this tool. Hope they pivot and I can re-evaluate them then, but they are off to a bad start.