Warms the cockles of my heart to see this project putting out consistent releases. I've been using it for a small romhacking project and it's been really fun. :)
While the devtool ecosystem around Allegro and LispWorks is better, SBCL as a compiler is a fair bit more performant. While it doesn't have quite the quick compilation times of Clozure, it's got everything else. I would go so far as to say it's the de facto CL implementation these days for noncommercial applications.
I see this sentiment asserted frequently but never with comparative data or examples. I have been using Common Lisp and other lisps for over three decades and never used these two, and have no obvious way to decide if or why I ever would. The free personal editions have so many caveats in their documentation I have had no interest in trying them first hand. SBCL has suited me well enough for quite some time, especially when combined with Emacs.
