> However, Swift's biggest problem is that any usage outside of the Apple ecosystem is a second(or third) class citizen. Until this is solved, Swift will remain mostly an Apple only language, regardless of how nice it is.

I think a time goes on this is more and more only a perception and not a reality. However perception is really important because it’ll mean even if it’s a great language with a great set of tools and libraries for all platforms it will not have a community of developers outside of the Apple ecosystem.