I did write this article a while back now:
ToneX was measureably better than KPA and QC. QC was measurably better than KPA. Which is also what my ears tell me.
That's not true for me tbh Ed. After 11 odd years of owning 5 different iterations of the Kemper... I had a moment of clarity with it - I've used the Kemper on some albums, but I've never liked the low end, and it always sounded different to the real amp to me. People blamed my DI box, so I got a posh one. Then people blamed my microphone, so I tried others. Then people blamed my refining process, so I tried loads of different options. Then people blamed my ears, and I stopped short of cutting them off and realised that most of the guys on the Kemper forums are just total fangurls and apologists.
Kemper v2.0 if/when it happens will most likely be amazing, taking advantage of machine learning techniques developed in the last 10 years. But the Kemper as it is... dead duck to me.