F# is not mainstream lang - it’s more like Clojure for .NET. My point was - you don’t have that variety in .NET as in JVM (Scala, Kotlin, Groovy are all relatively mainstream)
Kotlin is only mainstream on Android because Google says so, Groovy is barely kept alive thanks Gradle, and if it wasn't for Kafka and Spark, Scala would have been long gone.
Don’t get me wrong F# seems like a nice lang but definitely not mainstream (non geeks don’t use purely functional langs).
You can’t deny Kotlin is bigger lang than F# by any ranking from those popular (Tiobe) to unknown ones and is build on top of much bigger ecosystem (JVM) - that’s IMHO much more important factor for anyone doing commercial projects.
Additionally there is a big incentive to use it over Java (if you are stuck with older JDK) contrary to using F# over C#
Kotlin as a lang is better than C# (which is normal - it’s newer) and has better default IDE (IntelliJ) than anything on the market.
Well a bit exaggerated. Seen two Fortune 500 companies moving all never stuff to Kotlin on backend on my own eyes (for the reason I mentioned above) in some branches.
