I'd say Scala probably, but it leans very heavily towards providing escape hatches that let you use it as Java++, so it's easy to write code with mutability eve

I'd say Scala probably, but it leans very heavily towards providing escape hatches that let you use it as Java++, so it's easy to write code with mutability everywhere. This isn't much of a problem if you're disciplined about it yourself, but scaling across an organization, it's very tempting to treat it as Java++ and use it as such.