There was a good amount of discussion about what Common Lisp has to offer vs. other programming languages in the comments on this:

The Common Lisp Cookbook

https://news.ycombinator.com/item?id=14661239

262 points by macco 9 days ago | 184 comments

Not so much about CL vs. functional languages, but it gives a sense of the current scuttlebutt about CL.