Using a program from a REPL is fine and well, but if we want to distribute our program easily, we’ll want to build an executable. Lisp implementations differ in their processes, but they all create self-contained executables, for the architecture they are built on. The final user doesn’t need to install a Lisp implementation, he can run the software right away. Start-up times are near to zero, specially with SBCL and CCL.
