I have all the biggest models in each brand and find that all have improved more or less each of their new models. There are only 3 brands left in the top range as well as Roland which has some interesting keyboards.
I'm waiting for the advent of real artificial intelligence on our keyboards without believing it too much
that is to say a beginning of real "creation" in the accompaniment.
We've been using robots for 40 years now that just reproduce pre-recorded patterns
respect rules of music. Of course this tends to become perfect but real music is much more than that.

Already getting something in the OMB's gut but playable in real time would be progress in my opinion.