They're stupid, especially when you read the reasons mentioned by Paul Graham (the author of the original Lisp code) for Yahoo's decision:
- the programmers didn't know Lisp and were afraid to learn it
- to implement it to any reasonable extent, they had to build something in C++ that was basically a Lisp interpreter
- and even then they had to drop a number of features
Typical shallow-minded decision-making. Unfortunately there's more and more of this in software development. Afraid to learn a programming language? Pathetic.
At lemonodor you can find the original article.