VoiceOver on Safari 9.1.3 (MacPro) and 10.2.1 (iPAD/iPhone) does not announce a list for a groups of links when list-style is set to none
<li><a href="bedbath.html">Bed & Bath</a></li>
<li><a href="dining.html">Fine Dining</a></li>
url to test/verify: navigation tab menu at: https://www.w3.org/WAI/demos/bad/after/home.html
This was a purposeful change due to rampant "list"-itis by web developers.
In the same way WebKit differentiates layout tables from data tables, it now differentiates layout lists from data lists. VoiceOver users always used to file bugs that there were too many "start of list" "end of list" announcements on the Web. Customers seems much happier in the 3 years since this change went in.
Basically, if you remove all default visible indication of the list, there is no indication to a sighted user or screen reader user that the content is a list. If you want to override this heuristic for accessibility, you can always add an explicit ARIA role="list".
Read more about in bug 134187 or view the test case attachment
*** This bug has been marked as a duplicate of bug 134187 ***