miniblog.

I'm super impressed by how many lint rules can be implemented with just eslint's no-restricted-syntax and selectors. Example: { selector: "ExportNamedDeclaration[declaration=null][source=null]", message: "Add `export` directly to the function instead of a block export." }

Lisp is the only language I've seen where it's idiomatic to have some locals scoped to the *middle* of a function. It's a consequence of let blocks. It's neat, but I rarely miss it elsewhere. I'm happy with "scoped from here to the end of the block" in e.g. C or Rust.

5G is going to be pretty different: https://en.wikipedia.org/wiki/5G#Overview It's using higher frequency radio waves, which are absorbed by the air. You'll need an antenna every block (not every few km). On the plus side, it has a really low latency so is more broadly useful.