Good documentation will come. Apple's current priority right now is converting macOS to a closed OS like iOS. Once this is done, Apple can advertise the fact ho

Good documentation will come. Apple's current priority right now is converting macOS to a closed OS like iOS. Once this is done, Apple can advertise the fact how "easy" it is to build apps for both ios and macOS with one codebase. Apple will then taut "courage" as they force all Apple developers to switch to Swift if they want to develop on their ecosystem. You will ofcourse have to pay them for this privilege, and that ofcourse is the end goal.