It's not about what you need, it's about what the Kemper is.
I didn't see this on any of the competitors products.
Hey KPA has a USB slot why we can't use MP3 files for backing Tracks?
No one else has a Profiler. Why invent one? See my point?
With the transition to digital technology there‘s a whole lot of things which can be added by software which give value to the user. For example a metronome(-stomp).
This is the big advantage. I personally do not use some stomps (e.g. whammy, transpose, most delays, ...) but I am glad that they are available when I need them.
The KPA is a flexible tool and a metronome is crucial for practising timing and rhythm.