Personally I find it embarrassing that we use a device with gigabytes of RAM and millions of pixels to emulate a 19-button device from half a century ago.
It's also good enough. Most people don't need more than a pocket calculator. Sometimes I use WolframAlpha, very modern, but I type my query on a keyboard whose design predates the calculator (QUERTY in <1873 vs "10-key" calculator in 1902)