Exactly my thought: why is this clearer? I'm often think FP-first (data science) -- here though, I was surprised by how I went back over the imperative alterna

Exactly my thought: why is this clearer? I'm often think FP-first (data science) -- here though, I was surprised by how I went back over the imperative alternative. Avoiding `append()` isnt worth it in a language where this level of annotation is required to do FP. It's less clear.