I worked with a girl who didn't know what VHS was, and another who said that she wouldn't know how to use a rotary phone is it was put in front of her.
There is an entire population that thinks the # key was put there solely for Twitter. I call them Twits....but I am sure there is a nicer word. How can I blame them though? How would they know?
But you raise a more interesting point. And this post will be too long - lol.
I can intuitively operate basically all consumer electronics - I suspect you can too. I know how to set the stations on the car stereo without a manual. I can make a call on anyone's phone regardless of operating system. I can use any of the popular OS's where there is a gui (and many where there is not). I didn't have to open the manual for my FireTV or Playstation or Wii. I can set up a home stereo, surround, whatever you want. And I am not special - and I am not some engineer. We have been surrounded for decades by these devices. On occasion (as with my new microwave) the manufacturer gets a dim idea and forces it on us - like having to tell the microwave I am going to cook something before I can put the time in (Hey Frigidaire, It's a bloody microwave...this ain't ET and I am not phoning home with it.). I can figure it out. But generally, it's intuitive. And here you point out someone who can't use a VCR basically because they are too intimidated to push the button clearly labeled "Play" - or even consider it.
I am reminded of a woman on a camping trip who was distressed trying to get water. She didn't know how to operate the spigot because it was one of the ones where you pull up the handle to operate - rather than turn. I live in a desert and here is a woman who might have died of thirst a meter from an endless water source because she was too afraid to try (and being female is not the issue).
I am fairly certain I will have a post apocalyptic value if for no other reason than I can turn on the water...'cuz they don't make an app for that.