[hocuspocus]

I don't exactly see how Rust can replace Scala where Scala is mostly used today. Or even Swift, despite Apple being more serious on the server-side roadmap lately and hiring a bunch of people from the JVM world.

Kotlin doesn't bring anything new and is full of ad-hoc design decisions, and Java itself is catching up (and even potentially surpassing it, see pattern matching for instance). I don't think it's a huge threat. Sure you'll see people who didn't really understand the point of Scala move to Kotlin because they just wanted a better Java really, and Kotlin does that well. But I think it's been clear that Scala shouldn't try to pursue this goal, for the past 5 years at least, after the hype around Spark cooled off.

I'm happy that Scala 3 is focusing on the biggest pain points. I'm also quite happy with the resources that have been added behind the tooling and ecosystem lately. The Scala center wouldn't exist if there wasn't a real demand for improvements in the mid to long-term future.