Kotlin seems to have eaten Scala's lunch, for many organizations in the "JVM-but-not-Java" camp.

Also, non-backwards-compatible language changes fragmented the Scala ecosystem. Combined with the general trend of functional programming hype somewhat dying down in recent years.

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hocuspocus 3 hours ago | parent [-]

I try to keep track of teams moving away from Scala at my company and among my friends and acquaintances, and I know a lot of key people in the community.

Scala to Kotlin stories are extremely rare.

Kotlin is almost non-existent in the data processing world (Spark, Flink, Kafka streams...)

Kotlin's presence in the average CRUD web app or more complex SOA doesn't overlap with Scala that much, as someone who enjoyed the paradigms available in Scala would definitely not move to Spring, and frameworks such as Ktor or http4k are pretty niche. I've seen people move to modern Java, Rust (a lot actually), even Go despite the language being at the other end of the spectrum. But Kotlin, not really.

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brabel 2 hours ago | parent [-]

Funny how experience differs. I think almost all Java teams I know use Kotlin now in some capacity, mostly for new code but sometimes for all code. Not to mention Android is a very large share of applications and Kotlin is the default choice there.

	▲	hocuspocus 2 hours ago \| parent [-]
		How's that relevant to people moving away from Scala?