Too many styles "in Scala," specifically. The point is that some people (not me) prefer to use something restrictive because it keeps everyone on the team from getting too clever with code and making it unreadable. The little bit of extra typing is worth the easier time reading because that's most of what you'll be doing as a coder.
As opposed to an expressive language with powerful macros. Another person could hop on the team and write something that only makes sense to them, and now you have to understand their half-baked DSL.
The burden is on you, in an expressive language, to have a style guide for your team or enforce a style through code reviews. Whereas Golang just has that built-in and obviously is more than capable for writing production software.\
This is a criticism often levied against Scala because you can do pretty much any paradigm in it, and there's lots of disagreements over when to do what paradigm.
