[johnnycerberus]

What are the innovations brought by Allegro and Lisp Works, relative to Clojure? Just asking as I haven't heard about those, I only have experience with Clj.

[pjmlp]

A proper development experience like in the Lisp Machines, the whole stack is Lisp, compilation to native code AOT/JIT.

As Guy Steele puts it, Java is half-way to Lisp, even if you put Clojure on top, it isn't the same deal as 100% Lisp.