ASDF 3.3.0 has failures:
https://common-lisp.net/project/cl-test-grid/asdf/asdf-diff-65.html
Thanks. Interesting.
A whole lot of failures seem to be related to using now-deprecated
functions, that since 3.2.0 where causing ASDF to issue a
STYLE-WARNING, but with 3.3.0 are causing it to issue a full WARNING.
I'll send patches.