This one just occurred to me, but I have always had iffy handwriting and recently have been trying to learn Russian which is reliant on fairly tricky cursive.
I have found the whole experience of learning a new style of cursive to be frustratingly difficult and was wondering if not having a good visual memory might lend itself to a slightly harder time of it.
I am pretty sure that a base level of tech literacy is something that is not "impossible". Sure your average user may not be willing or able to get there, but I am pretty well immersed in the tech world and have a working knowledge on most of the important platforms and concepts.