it doesn't need to make sense on a higher abstraction level of logic/semantics I mean you don't see any of the nonsense in the blog post in any realistic PR (s

it doesn't need to make sense on a higher abstraction level of logic/semantics I mean you don't see any of the nonsense in the blog post in any realistic PR (so they don't matter), but you would run into subtle edge case issues if some expressions where more special then other expressions (so that does matter), especially in context of macros/proc macros or partial "in-progress" code changes (which is also why `use` allows some "strange" {-brace usage or why a lot of things allow optional trailing `,` all of that makes auto code gen simpler).