It's a good opportunity to tell the history of SGML, HTML, XML and XHTML (and possibly more, like long-forgotten SXML), and explain how we (the collective human

It's a good opportunity to tell the history of SGML, HTML, XML and XHTML (and possibly more, like long-forgotten SXML), and explain how we (the collective humanity) fu^W badly messed up our technology by following the path of least resistance because some (a lot of) lazy as^W folks can't be bothered to follow a bunch of simple rules.