I'm interested to learn that the {sub,}optimality of the QWERTY layout is controversial in discussions of whether the best design wins.
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I'm a huge fan of Swift's 'Error Handling Rationale' design document: https://github.com/swiftlang/swift/blob/9315673c003875158852579bd1f33480cdec5461/docs/ErrorHandlingRationale.md#fundamentals
It carefully defines terminology and compares with other languages, so you can understand Swift's position and preference in the design space.
I'm trying to decide the best voice for PL documentation.
Passive: "`let` can be used with destructuring."
Reader focused: "You can use `let` with destructuring."
Describing the PL: "FooLang supports destructuring with `let`."
Anyone have opinions or best practices?
What are the most popular languages that have used an AST walker for their implementation?
I know Ruby used to do this, but there must be others.
(I'm interested in the lowest PL speed that users will tolerate if you have awesome features.)