That will be a short article, though: "Because Go doesn't really work on Android. In fact, I don't even know what I was thinking. Seriously. Why'd I do that?"

(Yes, I know you can run Go code on Android but last I knew that's almost exactly literally what it is; you can run Go code on Android, but it has next to no integration with the rest of Android, just a very basic binding to things that are very cross-platform: https://godoc.org/golang.org/x/mobile/app)

It's not about android. People will start using Kotlin everywhere.

Remember Swift hypetrain a year or so ago? I do. People even made web frameworks with it.