I think the parent's point is: a couple of years ago handwriting was the only option. You'd see a post like this and know it was something special.
With LLMs, we can't tell anymore if something is a labor of love with hundreds of hours of work behind it, or half a dozen prompts to Claude Code.
Oh yeah I totally get that, and I feel the same, but the author of this project specifically says that it's hand written (first paragraph of the readme in the repo).