Cookie dough and ice cream scoops
I always just use a spoon (or sometimes two, in the case of portioning cookies) without issue. I never saw the appeal of these. Then again, there are probably people who eat more ice cream and make more cookies than I do.
Definitely agree on the rest. For measuring cups, also pay close attention to how the handle is connected to the body; I've had some that look like a single tack weld was done and they break off in now time.