Earlier quoted context omitted.
Typing hyphen-hyphen-space is hardly exotic — I've been doing that since well beyond the advent of generative AI.
Right, just saying things like that -- aren't immediately apparent unless they're pointed out to you. The extended palette of alt+123 keycodes, unicode characters, stuff like that requires "exotic" macros or keypresses to type out. Despite decades of extensive experience with writing, writing software, programming, etc, I never crossed paths with em-dashes. They were a niche thing prior to AI making them a thing. I b…
The reason "--" autocorrects to an em dash in practically any word processing software (not talking about browsers) is that that's the accepted way to type it on a typewriter. And you don't need to go into any system settings to enable it. It came in around when things like Smart Quotes came in.