From my experience, the main issue in any ticket system is when users can't explain their problem with enough details (and we need to contact them to get those details). Markdown, as a markup language, (with formatting purposes only), wouldn't help to solve this problem - because it's a communication issue, not a formatting/design one. Perhaps you're trying to solve the wrong problem...

I will try to migrate this to the newly created Power Users community, but I will have to clarify if it is on-topic there.

@hkotsubo‭ I don't think I am --- a user not providing enough details is another issue which can be solved by creating good forms ; and yet, to prevent cognitive biases in processing the data --- I do believe formatting can help.

Thanks @Alexei.

This question is being referenced by a Power Users meta post.