Before I bought my Kemper, I was using Amplitube, Guitar Rig and TH2, all PC based modelers. With this setup, latency is a killer, the processed signal can sound like it's behind what you are playing in real time, if the interface is set too slow.
At 96KHz, I get a latency value of 7.90ms,with a 1ms buffer. 7.90ms is the time it takes my input signal to get back to the output side of my interface, that includes all VST plugin processing. It was after the fact, that I noticed how much better everything also sounded, at 96KHz.
The lower the latency, the better performance and sound from my DAW and interface. If there was any possible way to get the KPA to run at 96KHz over S/PDIF, I would be thrilled.
I'm getting great sound out of the KPA analog out, @96KHz, so I'm not really missing anything, it's just a convenience and re-amping feature that would be greatly appreciated.