If there's a REAL Diezel or Bogner with a oversized Mesa cabinet in the studio... I'll be sitting my beer on the (unplugged) Axe Fx.
There was one recent post on TGP that implied that the KPA has a "dynamics processor" that addressed that. If so, the profile could be a relatively static capture with the processor inferring how the real amp would behave.How does the kemper handle guitar volume controls? I would think that it would have to sweep across to figure out the non-linear response curve of the amp.
For studio productions you can setup an amp with microphones and then record with your real amp. If you want to replace a track month later, you just use your profile. Because you could have problems to get the amp miked up exactly the same way.