I think Scala hast lost most of its appeal due to Kotlin. Scala has some really powerful and clean concepts, but tooling is not as good as Kotlin's. Scala has a much steeper learning curve, and Scala code can look very different depending on who wrote it. These are all drawbacks in real world projects.

With Kotlin you get like 80 % of the good things from Scala for 20 % the efforts.

I've switched from Scala to Kotlin 3 years ago and didn't miss much (real pattern matching come to mind).