I'm sure the reason is the plethora of markdown data is was trained on. I personally use ``` stuff.txt ``` extremely frequently, in a variety of places.
In slack/teams I do it with anything someone might copy and paste to ensure that the chat client doesn't do something horrendous like replace my ascii double quotes with the fancy unicode ones that cause syntax errors.
In readme files any example path, code, yaml, or json is wrapped in code quotes.
In my personal (text file) notes I also use ``` {} ``` to denote a code block I'd like to remember, just out of habit from the other two above.
Same. For me it's almost like a symbiotic thing to me. After using LLMs for a couple of years I noticed I use code blocks/backticks a lot more often. It's helpful for me as an inline signal like "this is a function name or hostname or special keyword" but it's also helpful for other people/Teams/Slack and LLMs alike.
I'm the opposite, always been pretty good about doing that in Slack etc. (or even here where it doesn't affect the rendering) but I sometimes don't bother in LLM chat.