Originally posted by jatrax [...] there must be hardware to support it.
You absolutely have no evidence to support that statement. The truth is people outside of Ricoh have no idea. It might require hardware, or it might be totally doable in software. We'll probably never know, just like we don't know if the K-3 could have done pixel-shift or if there's something genuinely new in the SR hardware of the K-3II.
Quote: - It is just a firmware update and Ricoh chooses not to make it available to older cameras to shaft their users and force them to buy new cameras. This of course is the cynical choice, but personally I don't buy it.
You don't seem to understand the realities of software development. Even if it is "just" a software update, there is still work involved, and thus cost. You have to backport a bunch of new code to the software tree of the older camera. The work involved can be substantial, and gets more likely to be a real headache as the camera model you're porting to gets older (and its code base further from your current development tree). Even if it's "just software", you have to draw a line somewhere. (Of course, there is also a financial incentive in pushing owners of your older equipment to upgrade.)
Personally, I think the decision to go to KAF4 makes sense, but the one to not support a flagship model from 2.5 years ago is painful. Even assuming the best case scenario of this being a hardware issue, I wish Ricoh would do something to extend a hand to buyers of this flagship (or perhaps even older models). What this could consist of depends entirely on how they handle future lens releases. If, for the next 1.5 years (until the K-3 is 4 years old),
most new lens released still have the aperture lever (and thus can be used on the K-3, and even older bodies), then everything is fine and nothing more is needed.
But if every new lens from now on will be KAF4 only, then I would like some kind of rebate program for body upgrades. (For this, I personally think the line should be at the K-5 II(s), but even if it's just for K-3 owners, that would still be pretty good.)