[pmoriarty]

Manual, rotary knobs remind me of phones with manual, rotary dials. They were everywhere through the entire 20th Century, but now there are plenty of people who've never seen them in their entire life, and of course youtube videos of kids being laughed at by their parents when they're forced to try to figure out how to use them. That's something else we didn't have back then: humiliating videos of ourselves -- recorded by our family, no less -- broadcast to the whole world. I don't blame the kids for failing, though. The dialing mechanism of such phones is clearly not very intuitive.