There's seems to be an emulator for everything these days. This is not the point. A physical calculator (and not a touch-screen app on a tablet) has something t

There's seems to be an emulator for everything these days. This is not the point. A physical calculator (and not a touch-screen app on a tablet) has something that the surrogate doesn't. For one thing it does not require you to do GUI context switching. It does not compete for mouse (or keyboard) with the other tens of open programs. I find this invaluable. On the other hand, touch screens take away tactile feedback. This gives the same bland taste as the soft power-off switches.