Swift Concurrency is a tire fire that not even their async-algorithms team can use completely correctly, and useful feature like typed throws are left half finished. The enormous effort the constant further bastardization of Swift takes, is at least in part the reason for the sorry state dev tooling is in. Not even a 4T dollar company can make a reliable SwiftUI preview work, in their own IDE. Variadic generics (a seemingly pure compiler feature) crash at runtime if you look at them the wrong way. Actors, the big light tower of their structured concurrency, are unusable because calls to them are unordered. They enforce strict concurrency checking now, but the compiler is too dumb to infer common valid send patterns; and their solution to make this abomination work in real codebases? Intro a default that lets _everything_ in a module run on the main thread per default!

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