Support for it is just one package-install command away, so I'd say Emacs supports it almost out of the box. Not to mention that for a language like Clojure you also need some REPL-interaction package to be able to evaluate code, so you won't get very far without an extra package like inf-clojure or CIDER. Re-implementing those would be a huge waste of time IMO and fracture an already tiny programming community.
To me it makes little sense to have support for everything built-in, as this doesn't scale very well. You end up distributing with Emacs a ton of functionality few people are going to use. That's why I've always been fond of having a slim core and lots of packages that people can install on demand. The package already is in NonGNU ELPA, which is pretty good for most users I'd reckon.
> Date: Sun, 27 Aug 2023 21:55:23 +0300
>
> Here's another discussion that kind of frustrates me. (I'm the primary maintainer of clojure-mode) We
> already have clojure-mode, we've had it for something like 15 years, I've taken the time to submit to
> maintainers, so there's little risk about the long-term maintenance of any of the packages there.
> What's the purpose of this discussion? What's the problem that needs to be solved?
It's very simple, really: Clojure is an important programming
language, and Emacs should have support for it OOTB. That's the
problem we'd like to solve.