Have a look new OS Version 3 for PA4X NEXT.
https://www.korg.com/us/products/synthesizers/pa4x/v3.php
Still looking into these changes, but I can't yet download the update...anywhere????
New Dark-Glimmering GUI; More sample memory 3Gb, Direct reading of User Samples from disk?
Easily Copy Keyboard Sets;Improved mono solo instruments; Improved Drawbars; Consolidated Record dialog; Improved Quick Record;

Get wired!

It is now very easy to connect small keyboards, mixing surfaces, percussive pads – the full catalogue of our KORG nano series of controllers! Just connect them to the USB HOST port, choose the dedicated MIDI Preset, and you are ready to go with a pad controller, second keyboard or remote control of the sound
General improvements

While we were there, we also added the ability to select more Song Book entries at once, lock the selected Keyboard Sets, remotely control the Synchro Start/Stop function via MIDI and of course tightened and smoothed out the whole performance system.


Tassie

Pa4X OS NEXT will be available late February 2019.

Slight delay...now they are saying early March.
Evidently after they announced the release, they had a lot of customers wish for certain other improvements and they are addressing those. I think it's great!

Don,
Finally someone might be listening and getting their act together, as this is a great 'board and will be better by all accounts, with even some of these improvements they mentioned.

Allan