[a2code]

I did not try Clojure so I cannot comment on how well implemented the features you quote are, when compared to CL. All I can say is that CL also provides much of the same functionality with its standard, cl-async, lparallel, parenscript, while (im)mutability is a matter of preference (IMO correct decision by CL) rather than dominance. The way I see it, is that CL is superior (opinion) due to reader macros and native compilation, rather than bytecode JVM.

[jwr]

I used CL for many years before I switched to Clojure. And by "used" I mean really used it, not just for applications, but I also dove into CL implementations, for example I added return-from-frame (also known as debug-return) to CMUCL.

So, I kind of know what I'm talking about :-) And I don't miss anything from CL: I honestly can't find a single reason to switch back to CL.