Hi Spalding
It’s easy to miss a post when the thread drifts off the main topic, however hopefully it will now come back to the original question.
You are correct it cannot use external VSTi, but like the previous OASYS it’s only because Korg do not enable it. Both appear to be based on the Linux OS, (From what I can gather) and disk streaming requires high speed data transfer which is easily achieved with computer hardware, not the typical workstation data bus, effectively the Kronos is a closed Lionstracs Mediastion where all the software has been designed by Korg, rather than a mixture of 3rd party software as used on the Mediastion.
I use my arranger/organ with VSTi without any external equipment, so yes, there is.
The display does show a Nylon Guitar, however there is something on the screen after it which I can’t make out, however if you watch this video
here from about 10.03, you should see what is going on, also have a listen to this video
here which shows a real guitar for a comparison, and you will note that neither the T4 or Kronos giving an accurate portrayal of this guitar. (Remember there are many different sounding guitars out there, so just because the one shown in the demo doesn’t suit you, it’s probably an accurate rendition of the guitar it was modelled on)
Bill