I was first a big fan of Scala, and while I still like it, I am now really into Kotlin.

I don't find it disappointing: I tend to consider that Scala was an inspiration for Kotlin. Maybe Kotlin won by being simpler, and definitely because of the tooling and community: being backed by JetBrains and Google helps.

For a long time, the tooling was very limited with Scala, which must have slowed its adoption, right?