Can only speak for myself, but I’d love to be able to use Swift elsewhere so I don’t need to drag around a JVM and all the things that come with it (Kotlin) or have to wrestle with Rust’s sematics and disinclination towards old style imperative desktop UI development. Swift isn't perfect of course, but it’s the closest I’ve come to a language feeling “comfy”.
Kotlin Multiplatform (KMP) is neat for android devs that want to be able to code for both platforms using a toolset/language they are familiar with, but for iOS development KMP is a hassle (personal opinion). I’d rather just write the code twice. Also, I actually like Xcode. As for Android Studio, up until the more recent versions the GUI felt really clunky to me (which made working in it a bit of a slog).
Have heard of it, haven’t investigated it deeply. Looks to still have some of the less-great points of the Java ecosystem on the build side of things (gradle) which is a detractor for me.
Kotlin’s syntax is also weird/quirky in some ways.
