I agree with @pdvrieze that Kotlin will need to interop with whatever libraries/frameworks are present on the platform that Kotlin Native is targeting. Trying to take the JVM ecosystem to every platform isn’t feasible since the ecosystem itself is tightly coupled to the JVM. There might be even be some serious legal issues that could arise from the Oracle vs Google case that is currently ongoing.
Take the Web platform for example where there are many useful libraries/frameworks that Kotlin developers WILL want to take advantage of. Any programming language that wants to target the Web (front-end, and possibly back-end) needs to seamlessly interop with the existing libraries/frameworks there. When it comes to memory management @Alexey.Andreev might have a point with Kotlin using something like ARC (Swift uses this system), instead of a GC.
Is ARC really a form of automatic memory management?