It seems like developers who champion Rust have a knack for making up a load of nonsense about other languages. Claude Fable knows exactly how to handle things in Go; the most recommended concurrency patterns are mastered by the likes of Sonnet, Opus, or Fable, and most of the concurrency "errors" cited in the Uber article are the sort of mistakes a Go beginner would make, some bugs are fixed on major go version too (capture loop..).