You don't typically see F# adoption in the enterprise either -- it's in use in specific business domains like finance, but rarely for writing general-purpose line of business apps.
Really, the "unsuitability" of Scala for the enterprise says as much about the common problems with enterprise development (What, expect developers to learn something new?) as it does about Scala.
I say that as someone who currently does C# work in an enterprise environment in which there is a ban on using "var" to declare variables with type inference.
Apparently
Dictionary<string,List<string>> dictionary = new Dictionary<string,List<string>>();
makes it really clear what the variable type is, but
var dictionary = new Dictionary<string,List<string>>();
Really, the "unsuitability" of Scala for the enterprise says as much about the common problems with enterprise development (What, expect developers to learn something new?) as it does about Scala.
I say that as someone who currently does C# work in an enterprise environment in which there is a ban on using "var" to declare variables with type inference.
Apparently
makes it really clear what the variable type is, but makes people's brains hurt.Sigh.