[pipo234]

Or how about all those windows 99% CLI programs that once in a silver moon decide to bother the user with a pop-up "Are you sure Y/N?". You find these on billboard, kiosks, payment terminals, ATMs.

Or try running a simple Java tool on headless Windows using Jenkins agent or cygwin SSH and you'll discover how horribly bad relying on a GUI can be. Or: how about automatically launching a MacOS VM on VMWare and setting up a VPN tunnel after a restart power outage without a mouse, keyboard and display. Should work in theory, but in practice never gets beyond most of the time.