I know! It's so frustrating! The way I see it, though, is that the Z suits most of my mobile-computing needs, and SSH and a desktop can solve what the Z alone can't do, so I'm in no big hurry to get a new device ( also because my budget is limited ).
I thought we wen't down this road before with tablets: the pure slate ones failed, and the convertables succeeded. If history repeats itself, we'll eventually get a good new platform.