For now but this is in the pipeline too.

https://github.com/dart-lang/language/blob/main/working/333%...

Great writeup, and I love that the authors looked at a lot of other languages. The solution section on how to prevent races is a bit light still - I‘m curious how they will solve this.

I think there will need to be exceptions to a strict race-free model eto not take away from dart‘s current capabilities, and without forcing people into something like a borrow checker. Swift has `@unchecked Sendable` which lets you tell the compiler "I promise I'll take care myself to keep everything in there race-free".

What I‘ve been missing in Swift are tools that let me add safety _within_ such @unchecked Sendables. There's the Swift Atomics lib: https://www.swift.org/blog/swift-atomics/, but its quite limited in its capabilities. So for now, I find myself reaching for tools provided by the community, like pointfree's LockIsolated: https://github.com/pointfreeco/swift-concurrency-extras/blob....