This problem is much more serious when you are talking about opaque DSLs. Even having to retreat to dramatically different corners of a huge language is not too hot. By comparison, a garden of libraries that are all readable by anyone in command of a smaller core language is a smaller problem.
"Every C++ shop has its own 'accepted' subset."
And it's frustrating. This quote from the article too:
"these are clear signs that C++ isn’t providing any real cost benefit for us, and that we should be writing code in other ways."