While I totally understand that the mission's computing power was decided a long time ago, if they'd left some 'high risk' room in the budget (mainly weight) th

While I totally understand that the mission's computing power was decided a long time ago, if they'd left some 'high risk' room in the budget (mainly weight) then they could have added whatever new tech was available, say a year before launch in the hope that it works, if it doesn't then the old klunky decade old tech will still do its job, but just maybe the foil wrapped iPhone will Facetime back to Earth and work just fine. Aside from adding a little weight, it seems like a small risk to throw onboard something closer to cutting edge with a caveat that it might not work in the mission plan. I bet if NASA had had a competition to come up with the most likely to work gizmo, up to 1 lb (or whatever) we'd have seen some pretty good ideas (beyond duct taping an iphone to the antenna mast)