Kotlin multiplatform being adopted by Google for huge projects like Google workspace makes it sound like it may actually be a winning proposition, if you ask me. Kotlin is replacing the more-than-a-decade old, battle tested, Java-to-ObjC translation at Google. I find that very impressive.
> also Rust is probably the better choice than Scala Native for that kind of code anyway
For sharing code between e.g. Android and iOS, Kotlin multiplatform seems to become the better solution. If you use Rust, you still have to call it from Swift and you just introduced a 3rd language.
I have always hated multiplatform frameworks, but Kotlin multiplatform is actually something that I find interesting (and flexible enough that you can choose where it makes sense to use it instead of committing to a whole framework).