The latest release of Steel Bank Common Lisp, version 1.3.1, was released on November 27. This month’s release contains 7 enhancements, including SB_THREAD for ARM64, and a bunch of bug fixes. See the NEWS page for details.
As usual, I compiled from source without incident. I ran the regression tests and got invalid exit codes for two obscure tests. As I’ve said before, these usually get cleaned up in a release or two. If you’re on Linux, you probably won’t get these errors.
I can’t say enough for SBCL. It has continuous development by dedicated maintainers, monthly releases, and complete source code. It’s free software and supports many platforms. If you’re looking for a first-rate Common Lisp environment, give it a try.