I'd say that not having "the whole language, all the time" is only (potentially) a pain regarding the development process/experience itself, not the quality of the resulting programs - which is what matters at the end.
In general, I believe people underestimate the importance of development time, as well as ease of training/hiring new programmers - one language is nearly always better as far as both of these things are concerned (unless that language is something like Malbolge).
