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The Distribution of Users’ Computer Skills: Worse Than You Think (2016)
(www.nngroup.com)
This is a most excellent place for technology news and articles.
As frustrating as this may be, it's even more frustrating when I see exactly the same thing among PROFESSIONAL SOFTWARE DEVELOPERS!
directory structure and basic text editing are foreign concepts to them. If it's not in their IDE, they really don't understand it.
Also, 90% of them are hunt-and-peck two finger typists.
I typed hunt and peck for so long that I can hunt and peck with my eyes closed. Though technically I'm not hunting anymore, just pecking lol.