[msla]

> Problem: Software

> Complex and Easy: Graphical User Interface

> Simple and Hard: Command-Line Interface

GUIs are easy for the specific things the programmers made easy, and potentially impossible for everything else. The moment you want something the developers didn't put in the GUI, there's no recourse other than writing your own tool.

Command lines are harder to begin with, but modern command lines give you a gentler ramp up to writing your own tools.

[jolmg]

Same is true with the other examples, I believe. Simpler tools tend to be the more versatile ones.