Thanks for those answers, they do reflect my understanding of how tags
have worked in AEM over the years. What's changed though is the
introduction of CFs and XFs which now allow content authors to reuse an
article across multiple AEM websites, multiple non-AEM websites (when
AEM is used as a hybrid/headless CMS) and mobile apps. I have noticed
that if you call the HTML of an XF (point your browser to the publisher
location of an XF) that you do get a fully formed HTML page with all of
the XFs c...