There are very few Electronic devices that are still being used even after 5 years of invention. It either gets upgraded or gets forgotten completely. Hand-held calculators have been the same since its invention in the year 1960’s. You have smart phones, tablets, laptops, PC’s and all that which has built-in calculator app but none comes close to ease of use of hand-held calculators.
However, I wish my Mac does this job than me pulling out my calculator and doing stuff. But the idea of me searching for numbers and arithmetic signs to do calculations was not easy. Though Alfred did the calculations, typing the numbers was my primary concern for not just me, but for many others as well.