In Gitlab's Markdown, I don't know how to insert a backtick in between backticks. I tried escaping it with a backslash, by doubling it, etc. It seems impossible to put a single plainly-visible backtick.

HN could be said to have a very minimal Markdown, with it's support for using asterisks for adding italics. We can't have plain asterisks, because of that, though.

I rather have no Markdown than Markdown that doesn't have escaping facilities to allow expressing all plaintext.