Most projects treat git as a versioned container for content – be it source code, artwork, text, 3D models, or raw data – but I feel that git also offers many new ways to express content. Maybe you could use git to play games like tick-tac-toe or Connect Four, or maybe you could use git as a metafiction element in a story, tracking the (fictitious) writing process. These are pretty obvious applications, so I’m sure there are much more clever ideas out there. There is zero practical application to 80×40. It uses git for collaborative 2D drawing, while also producing a 3D shape (the version history of the text block) that can be visualized in interesting ways. More importantly though, the current state of the 80×40 repository is not the product, the repository itself is the product.