DCE is also extremely valuable when writing lisp macros. Not having to do DCE in the macro is saves a lot of code. There is a talk by Kent Dybvig called "the m

DCE is also extremely valuable when writing lisp macros. Not having to do DCE in the macro is saves a lot of code. There is a talk by Kent Dybvig called "the macro writer's bill of rights" on YouTube that goes into optimizations that help macro writers.