Let $L =$ the LISP language. Let $P =$ a programming language different from $L$, i.e. $L \cap P = \oslash$. Let $t =$ time. Then $\lim_{t \to \infty} P = L$.

Proof:
Trivial, just look at the extensions they are making on Python, Ruby, Java, C# and C++11.

Hehe.