It's always a dilemma for some users whether to upgrade to the newest version straight away. I prefer to leave it and let others discover any bugs which usually get picked up in the first few weeks (talking release versions here, not betas).
As much as i have had a bit of fun playing with the new FX i will effectively be using my KPA with the same sounds and set-up as i have the past few years so could quite easily have bypassed the last few upgrades. Lockdown was a good time to have a dabble.
The advice from Kemper is use the latest version (as is the case with any software manufacturer) though it may result in a change of features that the user didnt want or need to adapt to.
The main reason i upgraded was because I upgraded rig-manager in order to audition some new sounds which then required me to update my KPA OS in order to connect.
So far so good but want to test it hard as the first gig (in ages!!) is in two weeks time.
Whether we like the upgrades or not, you have to hand it to Kemper that they are as passionate about the KPA as they have been from day one and i still look forward to new (and exciting) features and effects. Whether i find them useful or like the the OS changes is another thing!