So I've owned a Kemper power head for many years now and I love it to bits.
However, it still doesn't give me the same physical response as playing a tube amp in the way you can feel the notes push out at you.
The best way I can describe it is comparing 2D to 3D. The image/sound is almost identical but the responsive feel of playing it is different.
I mostly play it through cabs (with the cab sim off) and have also put it through a few FX loops of tube amps to use the power section and then into a cab, which is a slight improvement.
What I'm wondering is (technically), is it possible for Kemper to add some feature (like a Thump knob) that would allow you to control this aspect? And if it's more down to the power section, could someone (technically) design a power amp that would give you this feature and allow you to control how much the notes push air from a cab?