For the non users of Performance Mode just remember that even if you can use it with any midi controller it is specially designed to be used with the Kemper Remote.
And once you have the Kemper Remote, using Morphing you not only have the 5 basic tones plus effects/stomps for each slot but also one morphed version of each, by stomping the same slot a second time.
I have done the "by song" method for years when I was playing covers. And now that we are writing music I have a BASE performance with my 5 favourite profiles of different amps from completely clean to heavy distortion. And I have also made some performances of 5 tones of the same amp.
The possibilities are endless and you can tweak the profiles for each performance without altering the original ones in Browser Mode.