Swift is only complex if you need it, otherwise very easy, with few caveats.
And it's efficient enough for all application / cli etc use cases -- if Go can do it, Swift can do it even better.
It's not Rust in performance and low-levelness, but Rust is the "really complex" one in its semantics and learning curve.
This might be hyperbole, but if not I'd love to see some examples on how Swift can improve on Go's concurrency patterns.
[0]: https://forums.swift.org/t/on-the-road-to-swift-6/32862/
Yes. A feature well designed for this very purpose.
>Also is GCD green?
GCD tasks are not green threads but they're not direct threads either (even though they're used under the hood). They're more lightweight and much faster to create (than direct OS threads).
If you claim something like this, please obviously back up your claims or in the very least, cite a simple example.