And, their free versions are very capable. I subscribe to LispWorks Pro yearly updates, and if I had extra money I would like the commercial version of Allegro Common Lisp also - but since I also use SBCL a lot simply because some software like McCLIM is just easier to run with SBCL, it is really hard to justify also paying for Allegro. Initially, I paid for LW Pro to get no charge redistribution of apps, which is a good selling point. Allegro is more of an enterprise software product, and I had a long term customer who used them because of great support, AllegroStore, AllegroGraph, etc.
Compared to the 1980s, the Common Lisp ecosystem seems so much healthier and more vibrant now!
Compared to the 1980s, the Common Lisp ecosystem seems so much healthier and more vibrant now!