While I agree that the Win 10 stuff looks the worst ever, the slide to mediocrity hasn't been all that sudden. The Vista/7/8 calculators can't even handle 64 bit numbers.
Try doing a conversion of an unsigned 64 bit hex value of 9000000000000000 to decimal, for example. You get a negative number.
Do a hex to decimal conversion then want to do some scientific math on it (something I actually do occasionally). The newer versions just lose the accumulator during the switch in modes.
Fancy features like history aside, the old XP calculator, derived apparently from a 3rd party application called Calculator Plus, was the last one that actually was made to be used seriously.
Edited by NoelC, Yesterday, 05:20 PM.