iOS is too “intuitive” to properly document and share documentation for all the features they provide. It’s got a wide variety of power user features that come and go, and this word of mouth thing is basically how you find out about them. Try and search for them and you’ll get documentation from 10 years ago that no longer applies, if you’re lucky.
They need to start shipping the documentation on the actual hardware. Imagine its 1995 and you try and release a bash tool that has no built in man file or documentation of any sort short of some page on your personal website. Bash users would probably call you a script kiddie and yell to get off their lawn.
