Is 3D graphing still on HP's Prime to-do list?

[DrD]

Well, to answer that kind of question, it's the starting point of your foray into the Xcas camp, for which Google, or the like, is your best guide. Xcas is the mother of the Prime CAS, and the father, (Parisse), often fills in missing details (here) when we stumble along the CAS path...

This is yet another one of those hang time on the learning curve details...

-Dale-