Earlier quoted context omitted.
How is what you described (having to solve a problem once) different than most languages (especially those with garbage collection). It seems like you're describing libraries, ala growing a language ( http://video.google.com/videoplay?docid=-8860158196198824415... ).
Lisp dialects afford you more powerful tools for abstraction. Whereas most languages provide abstraction at the function level, Lisp allows for syntactic abstraction via macros. Think of constructs like the if-statement that only evaluates one of its consequent and alternative, or short-circuiting and- and or-expressions. These things are impossible (or awkward/difficult) in most languages, but Lisp makes them relati…
The real question is how much of the language is built out for you already. And what type of "culture" does that build out presume or create...