Comment 2 for bug 1826074

Each time ASDF is updated there are problems cropping up, some of which are not bugs but backwards incompatible changes. When somebody updates SBCL they may not want to update ASDF at the same time. With it being a third party project we cannot direct the same attention to quality or have the same policy towards backwards compatibility.
If anyone wants to update ASDF they can do it locally, to any version at any time, by loading it before the one bundled with SBCL.