It is relevant, because the unsafe features are still there, regardless how many use them, language culture and what not.
Likewise Clojure contains the main features of CLOS and makes use of them to interop with JavaScript, Java and C#, regardless how many in the community make use of it.
A language is made by the language specification and its standard library, not by whatever the community feels as trendy.
Present us a full compliant Clojure implementation minus CLOS, and lets see how far it goes.