This is nonsense? It doesn't need any more "runtime" than Kotlin does.
> it is not fully compatible with java as kotlin.
This is a lie. (I don't say this lightly, but I've seen it too often from too many kotlin advocates for it to be an innocent mistake)
Last time I checked you needed like 500kb of libraries for any scala program compiled to Android. Kotlin is a few kb. Kotlin is a small addition to the java API, Scala needs much more things.
> it is not fully compatible with java as kotlin.
As far as I know, the way scala treats types and functions make it that sometimes you cannot call scala code from java. Well, you can most times but requieres a lot of wrappers. This doesn't happen in kotlin.
I learn scala few years ago, my memory is weak and things may change. But I wanted to use it for android and give up quite quickly because of lot of issues. For kotlin was like love at first sight. No problems at all.
30kb for Scala is the figure elsewhere in this thread and that sounds a lot more in line with my experience. Note that you never have to use e.g. Scala collections if you don't want to (and thanks to typeclasses you can write elegant code that works with both Scala collections and Java ones, so you can reuse libraries across both).
> As far as I know, the way scala treats types and functions make it that sometimes you cannot call scala code from java. Well, you can most times but requieres a lot of wrappers. This doesn't happen in kotlin.
Nope. There's no difference, just kotlin propaganda.