Your point of view is very like a hobbyist. Do you use your Profiler in a professional way?
Put as many functionality in the KPA as possible ... and then complain about system stability and performance.
Each hardware has an amount of limited resources and each product is designed for a specific target group of users.
A metronome cost less then 100 Bugs, buy one and use it if needed.
I bought my Kemper as Live Performance and Studio Amp-Replacement and definitely not as training device.
I'm always using click tracks with in ear monitoring live and in studio, and if I need a Metronom Click i can always Mix in a Metronom or a Drumloop from the DAW or anything else.
Happy new year
I won‘t answer to your post in detail since it contains hypotheses about what I am or do which - by the way - are of no concern for the matter.
I also won‘t rectify the sense of a metronome. This should be clear to everyone.
I connect a metronome using the AUX of the KPA. It would be way less hassle to avoid third party hardware in the process for the sake of simplicity.
Here‘s a small story this discussion reminds me of. I was on a workshop at which Thomas Blug unveiled his „Amp 1“ some years ago. I asked him if it was possible to connect a stereo signal / AUX. Most of the guys in the audience had that „dafuq“-reaction, some even giggled around. Thomas Blug took this thing very seriously and answered that he had exactly that in mind and implemented this feature, especially when I explained that I would need this functionality to prepare for sessions / rehearsals where you get recordings / arrangements upfront or simply to listen to the guitars / soli in a recording to play after.
I only play guitar using the Kemper these days so I would like it to contain everything that I need as a guitar player on a regular basis - including a metronome.
If you do not need one that‘s perfectly fine. I do not judge that and would kindly ask you not to judge others as well.