Specifically, actors would alleviate the the mental overhead of constant dispatch queue management littering iOS codebases. Certain UIKit classes would gain @UIActor and suddenly you get a compiler error if you try to modify a view from a background thread. I can’t seem to find any references to that in the current proposal.
Regardless, I’m excited for actors to land in the next release. I’m just concerned adoption will be similar to Swift 3’s do/try/catch syntax, which didn’t take off until UIKit converted all fallible synchronous methods from `(Data?, Error?)` to `throws`.