The thing about DSL’s (or really any programming language abstraction) is that they make it easier to understand the intent of the code at the expense of making it harder to understand the effect of the code. I find that the cognitive load of maintaining a project with lots of DSL’s is high. The advantage of e.g. java over scala is that while java code is often more verbose and ugly, it holds fewer surprises. Like anything there is a trade-off here, adding more DSL’s can be better or worse.