That is the problem, no-one bought the KX series and reviewers tended to talk about it as “cubase only” even though it had support for a number of other DAW’s, I have one BTW, good for the price.
I think it is unlikely that we will see any more products like that simply due to sales and if people and in particular “consensus creators” like magazine reviewers and influential posters on the bigger web boards perceive a product with greater Cubase integration to be “Cubase only”, which makes marketing of the product to the general public more difficult