A modern programming language that makes developers happier.

kotlinlang

Together with SwiftUI Apple also introduces some new language features like function builders. A K/N Swift interop would help to bridge this new world. 

<https://github.com/apple/swift-evolution/blob/9992cf3c11c2d5e0ea20bee98657d93902d5b174/proposals/XXXX-function-builders.md>

<https://github.com/apple/swift-evolution/blob/master/proposals/0258-property-delegates.md>

<https://github.com/DougGregor/swift-evolution/blob/opaque-result-types/proposals/NNNN-opaque-result-types.md>

Jetpack Compose and SwiftUI are too similar. I think with declarative UIs, crossplatform UI is a lot closer.

I think at this moment in time it would be very wise to invest in Swift Interop to make Kotlin Native a lot more relevant in the near future. In two years this is the way to go for all macOS/iOS/iPadOS/watchOS/tvOS development and interop with these new Swift features and structs would make a lot of difference.