Yes, there are good reasons for a second kemper, e.g. one at home and one for gigs. But last year all bookings are canceled and now I am waiting...
Dual amp thing? Like V8Guitar said for live gigs I want it simple. For home usage maybe its a good thing. I wonder I you can get the same sound if you use profiles witch are already blended with two amps. Maybe not, because you can use different cab simulations with two kempers.
Which has absolutely convinced me in terms of sound is the usage of the kemper with the kemper cabinet/kone (mid) and additional in my home studio with monitors (stereo). That sounds fantastic to me. Too bad I haven't been able to use the kemper kone live yet.
Just some thougts...