Cons is an implementation detail that no longer exists in reality. Most Lisps implement conses as arrays, and some Lisps, like Dylan, don't even use them to represent structure.

No programming language will survive a 1000 years. Not many works of science or art, or even human language have.

Programming language research has already grown past Lisp itself, or any other programming language, really. What we have now are logical models, their derivations and their proofs. If any of them can be materialized in an implementation, made practical, or even commercialized, great. Otherwise PL research is happiest as .. logic.

Edit:

اخ محمد، عجبتني رؤية لغتك البرمجية العربية. قمت ايضا بأنشاء بضعة لغات برمجبيات عربيات، معظمهن كلغات شبه لسبية :-)