I have a TI-83 and an HP 19B II and both see regular enough use that they live on my desks (one at home, one in the office) rather than in the drawer. The calculator on my phone sucks (no history, difficult to enter anything more complex than adding up a few numbers) and I don't even know how to calculator on my Mac (because I never had a need to).

I use the calculator as an extension to my brain, it has a little memory and a lot of quick compute available, I know how it works well enough that it's all muscle memory and invisible to my conscious processing.

If quality scientific/business calculators ever go away I'll be sad.