You are right, you didn't talk about device value but it's a factor in the equation.
Every one has not the luck to have bought a Kemper 10 years ago and use it intensively. The familly is built on the same platform and if they change one of them, they will automatically have to make evolve all devices. Some will be disappointed.
I know that a day will come for a Kemper 2 but IMO, it can wait a while.
I talk about Line 6 cause they changed their strategy with the Helix familly, it's easy to say today that there's no matter for them but they made a risky bet. They were not in this range price before. Helix Floor and Rack was sold three times more expensive than the HD500X. And there was a turn over before with their devices....I bought a Firehawk, don't need to say how i loose in one year. With the Helix LT, it was not the same case...And it lasts (as Kemper does...)
I switched from Helix to Kemper Stage and i know i've lost some possibilities, but i'm really not disappointed at all.
There isn't this beautifull screen, less connections, no integrated soundcard, no parrallel paths, etc....I knew it since the first day i bought the Stage, but this sound, WOW.... simple rig ; it's enough for me... It's already old looking since day one but i really love this device. And there have been a lot of improvments during all the 4 past years ; delay/reverbs, Kones and the possiblity to use non-mic'ed simulations with imprints, Rig manager that can control Rig's settings, ios app with wifi... I didn't imagine it was possible to.
In fact, i ask myself what would make me buy the K2, i already know what i've lost and i don't need them so if they are in addition in the next Kemper, it won't be a reason to buy it for me.... I don't think they are falling behind competitors too....