The comparison with databases is an interesting one. I have observed in both that really diving into exploiting the domain in a language-native way (e.g. CSS or SQL) can lead to extremely powerful solutions, but ones which don't integrate very neatly into a broader system. So you usually find people inventing patterns, or restricting themselves to subset -- choosing to skip some of the power in favour of maintainability. You can build an entire system in just SQL and little-to-no other programming languages, but should you?