Wow! Kemper powers-that-be give up a new OS which is safe to proceed with, and the bitching continues, regardless!
I play live, and that is why I bought my Kemper. However, those of us who do play live and have been playing for a respectable period of time, should understand how delays and mishaps do occur at unexpected times during a live performance.
Knowing that boot time is what it is, the correct thing is to bring another backup amp which can be set up almost in the blink of an eye and be prepared. I carry a Crate Power Block. All I have to do is switch out the cab and guitar cables and continue to play. No, it isn't going to be as good as using the Kemper, but that is how I deal with this problem.
I find nothing wrong with making the powers-that-be aware of our needs, reasons, and feelings for a specific problem as we see it, but it would be more humane, or reasonable, to make the request, and ask for what reasons the particular fix has not yet been addressed, rather then get your bowels in an uproar and point the finger at those who have just given us another milestone with the release of 4.06!
Maybe save the complaining until tomorrow, at least. For now we have something to be happy about.
ymmv