Going back 5 plus years, I would agree that Kemper beat the competition in feel. It had its issues, but for my non-high gain needs it did feel more like playing a real amp than Helix, Atomic, and prior gen Fractal. It was (and is) a digital solution where you could load a good profile and enjoy playing which made its faults worth accepting.
These days, QC, Tonex, and NAM all do that even better. I expect Proxy will as well, but obviously it is way too soon to know. I also truly hoped a next gen Kemper profiling would offer a big step up, but seeing the MKII hardware, I am highly skeptical that they can even catch the competition let alone beat them with just a software tweak.