[lispm]

> How does javascript qualify?

It has symbols as a basic data type, slightly similar to Lisp.

> But none of them integrate seamlessly with the language, because there's fundamental conflicts with the language's default evaluation model

Lisp has symbols to implement these other evaluation models.

Every evaluation model will have some problems integrating other ones. Most of them have a particular purpose: algebra, theorem proving, predicate logics, planning, ...