This is an initial draft posting for discussion
Unit Tests Skipped
11.x ABI compat isn't the headlining reason to retire, necessarily.
This message needs to be more along the lines of "This hardware no longer relevant to FreeBSD" or "This wifi driver doesn't support FooBar crypto" or some other minimum bar.
This was copied from an in-tree one, but indeed "Giant locked filesystem" is probably a good canonical example
Here's some examples from the tree, as they'd appear in dmesg:
Deprecated code (to be removed in FreeBSD 13): pccard removed, an doesn't support modern crypto
IMO something short like "ISA drivers", "obsolete hardware" etc. is what we should suggest