The combinator example is the JS equivalent of what was discussed in another comment on this article, https://news.ycombinator.com/item?id=35247615. I like having the clarity of using different "and" and "or" keywords instead of overloading && and ||.

But I definitely agree with the sentiment - every new feature is another thing that a developer needs to learn if they encounter that code. There should be a large "barrier to entry" for new features.