OK, technically correct but I still disagree they are actually 10 because aside from `str` (which should be used only for constants really) and `String` everyth

OK, technically correct but I still disagree they are actually 10 because aside from `str` (which should be used only for constants really) and `String` everything else is strictly optional and you're not mandated to work with it unless you got a specific scenario (like CStr / CString). Compare this to Haskell where you have lazy and non-lazy / Unicode and non-Unicode strings which is at least 4 (I think there was more but I forgot now) and you are practically forced into using any of them depending on which library you're interacting with -- and I don't mean with C libraries in this instance. I personally never even used anything beyond `str` and `String` for any app development, including a bit lower level stuff (though not embedded or tight integration with system libraries).