Why there are other programming languages besides Lisp? With Lisp's macro system you can create any language you need ever. Small, big, finely tuned for your task. Supporting other languages means opposing progress and delaying the inevitable future. There should be only one language and myriad languages at the same time. The one language is Lisp.
>>1
Lisp has been around long enough that if it was going to make any dent in software engineering in general it would have already done so a long time ago and we wouldn't be having this discussion.