Just trying not to ignore what is spelled out:

>But I don't expect to convince anyone (over 25) to go out and learn Lisp. The purpose of this article is not to change anyone's mind, but to reassure people already interested in using Lisp-- people who know that Lisp is a powerful language, but worry because it isn't widely used. In a competitive situation, that's an advantage. Lisp's power is multiplied by the fact that your competitors don't get it.

Heh, I forgot that part.

I’d argue that today libraries and super used code (more bugs already found and fixed, more answers on Google) > powerful language.

I think the main things that's happened is that many languages and frameworks coalesced to fill the void PG and Morris probably used lisp to such great advantage; ie building featureful, performant web apps. In the mid 90's there was perl I guess. Nowadays there's python, php, ruby/rails, etc.. with all their frameworks and environments. Mak

> more bugs already found and fixed

I'd argue that libraries that used to have bugs found and fixed tend to have many more of them to catch you by surprise later. They also tend to have less stable interfaces.

> more answers on Google

Also, the libraries complex enough to need many questions on Stack Overflow are normally the same as the ones above.