It's good, but it's not really anything special. It feels like a mixture of the good parts of Scala, Kotlin, and Rust. Unfortunately lately it's getting pulled in a weird direction by SwiftUI (property wrappers and function builders are just unnecessary). It will be interesting to see how their actor implementation plays out. For the most part though it feels very restricted with its need for Obj-C interop and I suspect it will never make the leap out of the Apple ecosystem simply because it doesn't offer enough over the aforementioned languages to be worth the trouble.