li>
<p>Commit messages (even if they are all UTF-8) by default become
corrupted due to not being updated&#8201;&#8212;&#8201;any references to other commit
hashes in commit messages will now refer to no-longer-extant commits.</p>
</li>
<li>
<p>There are no facilities for helping users find what unwanted crud they
should delete, which means they are much more likely to have incomplete
or partial cleanups that sometimes result in confusion and people
wasting time trying to understand.  (For example, folks ten