SLIME was used in the early days of Clojure but is long sinced replaced by Cider (also emacs) or other impressive tooling, i.e. add-ons for IntelliJ (like Cursi

SLIME was used in the early days of Clojure but is long sinced replaced by Cider (also emacs) or other impressive tooling, i.e. add-ons for IntelliJ (like Cursive). I would say there is nothing that SLIME offers that was not replicated or improved upon in Clojure's tooling.