Most important reason for the rebirth of golang (after it's initial dip in early '10s) and wide spread adoption of Kotlin is the ownership of Java by Oracle. It

Most important reason for the rebirth of golang (after it's initial dip in early '10s) and wide spread adoption of Kotlin is the ownership of Java by Oracle. It doesn't matter what fine print exists, but everyone knows what kind of a*holes Oracle and Larry Ellison are, they will find a way to squeeze you. Everyone is going to sprint away from Java as soon and as much as possible. For someone like FB, Kotlin being a nicer language is just cherry on the cake.