Haha, none personally but maybe the photographer did. It's a free stock photo.[0]

I hired an illustrator to design a custom cover for me, but the project went off the rails, as the artist was using AI in ways I disliked, so I ended up just doing my own mediocre cover in two hours.[1]

[0] https://unsplash.com/photos/shallow-focus-photo-gray-balance...

[1] https://mtlynch.io/retrospectives/2025/01/#my-poor-experienc...