I really don't get all this animosity towards the use of GPS in the PPL. It seems a little dogmatic.
I agree wholeheartedly that a PPL holder must be entirely competent in navigating VFR without GPS or radio nav. But surely there is so much to gain by using GPS in a manner that robustly complements VFR navigation. I'm under the impression that there is a growing body of "best practice" for using GPS in this way: and if this is the case, then tuition of this best practice should be incorporated into the PPL. It's possibly worth keeping the QXC GPS-free, along the same principle that elementary radio-nav is taught in the PPL but not significantly tested.