I use my Kemper exclusively for live work and having a user interface of some sort that would make it easier to manage all of my presets across all of my performances (and all of the future performances I am waiting to set up once something comes along that makes it easier to manage them and the presets) would be extremely valuable to me. IMHO, it has nothing to do with live vs. studio or pro vs. amateur, and everything to do with being able to fully exploit the full potential of the unit in a user-friendly way. Contrary to some, the current interfaces that are available (screen on front; rig manager; methods of preset management) are not user-friendly and capable of allowing the sort of control and interaction I need. YMMV
I am thinking that the big difference in the use cases between live users is on how you setup for gigs.
I remember a thread some time ago where this exact question was asked. I was surprised to hear that many people setup performance levels for specific songs, then use rigs within the performance for different sounds within a song. When setting up the KPA for the gig, these people actually setup ALL of the performances for every song in the set list.
I can really see a need for a software management system for this use case.
Others (like myself) don't have a performance per song, but rather a set of performances with different gains and types of amps going from left to right clean to heavy. Only a few performances are used on every song played. This use case needs much less editing and management.
I think that recording may be the most dependent of all use cases on its need for a PC editor.