I find Rust's RFC/design discussions fascinating. They're a mix of serious Programming Language Theory and practice. The same feature in Rust is seen by some a

I find Rust's RFC/design discussions fascinating. They're a mix of serious Programming Language Theory and practice. The same feature in Rust is seen by some as "algebraic data types" and "oh cool, I can add data to enums" by others. Some feature proposals starting with "wouldn't it be nice to have…" end up designed with input from people who literally have a PhD in this feature (and are bikesheded until people without PhDs can use the feature).