Really exciting stuff! I'm really looking forward to improvements in concurrency and ownership in Swift. Also variadic generics will be a really welcomed addition to the Swift language!
@tkremenek, will improving the String API be part of the direction for Swift 6? Providing better ergonomics and high level support for regular expressions really has the potential to make strings much more powerful in Swift. Also, it would be nice to ditch the clunky and limited API of NSRegularExpression that as of now we have to depend on. This was laid out in the State of String: ABI, Performance, Ergonomics, and You! and the corresponding Swift Forums thread.