This is cool, though for lowering the barrier of entry downloading a single jar is great. If ppl is first coming to Clojure w/o too much knowledge of java, having to install Ant first, clone a repo and build it manually could be a bit daunting.
Linux can use brew as well, or just download an installer shell script and run it.
Windows can use an (alpha) installer for Powershell or use Scoop via this bucket https://github.com/littleli/scoop-clojure
That's for the official CLI that works with deps.edn files for dependencies.
You can also download Leiningen -- a single shell script (macOS/Linux) or batch script (Windows).
If you use brew/scoop, I don't think you even need a JVM installed as they will do that automatically.