You ever been in their research labs and crap? They're not exactly using vintage equipment...some of it may be a few years old, but its still "new".
Alot of the things done at NASA are using state of the art gear. Maybe the probes aren't, but a tonnnnnnnnnn of stuff is. Go there and see for yourself, they give frigging tours of some of the research places ffs.
I was talking about the stuff they send into space not the compute equipment on the ground, e.g. the stuff an astronaut has to work with. For the latter they use the most cost effective, e.g. state-of-the-art equipment.
I live in Europe and did not have much contact with NASA. I am doing radiation hardened chip design for ESA (the European counterpart) though. We use 0.18um technology, not really state-of-the-art.
greets,
Staf.