In 2007 Donald Norman wrote a piece on command-line interfaces that&#x27;s pretty cogent: <a href="http:&#x2F;&#x2F;www.jnd.org&#x2F;dn.mss&#x2F;ui_breakthroughcomma.html" rel="nofollow">http:&#x2F;&#x2F;www.jnd.org&#x2F;dn.mss&#x2F;ui_breakthroughcomma.html</a><p>Text UI is a great way to hide complexity but difficult to teach and form habits around. The learning curve is steep and probably something we need to invest more in because &quot;have you read the man page&quot; isn&#x27;t gonna cut it for most.