When comparing Red/System vs Common Lisp, the Slant community recommends Common Lisp for most people. In the question“What are the best systems programming languages?” Common Lisp is ranked 12th while Red/System is ranked 15th. The most important reason people chose Common Lisp is:
Almost all aspects of the language are designed with interactive/repl use in mind.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Built-in support for concurrency
Red has built-in support for concurrency and multi-core CPUs.
Pro Carefully designed for interactive use
Almost all aspects of the language are designed with interactive/repl use in mind.
Pro Very Powerful REPL with SLIME
SLIME (Superior Lisp Interaction Mode for Emacs).
Pro Condition/restart system
It is easy to recover from errors. Error resolution can be determined by the user at the REPL.
Pro Image based runtime
The state of the program may be saved and reloaded as an image, supporting safer modification of the running program. New code may be compiled into the image as the program runs, while late binding ensures that symbol redefinitions take effect throughout the program.
Pro Almost as fast as, or faster than, C
Some compilers such as SBCL can be faster than C or other low-level languages, and most compilers can generate fast native code.
Cons
Con Doesn't work on 64-bit OSes
Still hasn't upgraded to be 64-bit OS compatible.
Con Not ready for production
Red is still on version 0.6.0. Which means that it still has some way to go before being used in production and in large projects.