I love actors, but baking them into the language like this seems like the wrong approach to me.
The language should provide all the necessary abstractions to create an isolated context. Actors can then "just" be a default abstraction provided by the standard library.
Side note: has the Swift cross platform support improved? I was very much looking forward to using Swift as a general purpose language, but Apple didn't seem very interested in making it a true first class cross platform language. I believe IBM also dropped their "Swift for the server" efforts a while ago due to similar concerns.
The language should provide all the necessary abstractions to create an isolated context. Actors can then "just" be a default abstraction provided by the standard library.
Side note: has the Swift cross platform support improved? I was very much looking forward to using Swift as a general purpose language, but Apple didn't seem very interested in making it a true first class cross platform language. I believe IBM also dropped their "Swift for the server" efforts a while ago due to similar concerns.