"things it should definitely not be doing (massive files, enormously complex formulas)"
Massive files especially is something Excel "should not be doing" for superficial technical reasons that are mostly unrelated to whether the UI is a good fit. "Enormously complex formulas" do call for better editors, but again don't damn the model.
Massive files especially is something Excel "should not be doing" for superficial technical reasons that are mostly unrelated to whether the UI is a good fit. "Enormously complex formulas" do call for better editors, but again don't damn the model.