The identitiy is clear, it is a language first and foremost for Apple ecosystems.
It also needs to target GNU/Linux, because Apple got rid of their server offerings, thus anyone doing server code for applications on the Apple ecosystem, that wants to stay in a single language needs to be able to write such software on GNU/Linux with Swift.
Windows well, since they have the open source story, it kind of falls from there as complement.
On the revamped website they are quite clear about the identity.
Cloud Services, CLI and Embedded as the main targets for the open source version.
It also needs to target GNU/Linux, because Apple got rid of their server offerings, thus anyone doing server code for applications on the Apple ecosystem, that wants to stay in a single language needs to be able to write such software on GNU/Linux with Swift.
Windows well, since they have the open source story, it kind of falls from there as complement.
On the revamped website they are quite clear about the identity.
Cloud Services, CLI and Embedded as the main targets for the open source version.