Ah, thanks, I was looking at the Rust page. I'll consider sending them an edit.

Sent one in: https://en.wikipedia.org/w/index.php?title=Monad_(functional... we'll see if it gets reverted. Honestly, I find this whole section kind of awkward. I fully agree with you that it doesn't really show off why this stuff works, and works well. Real-world code doesn't get written like this.