I'm happy this topic is still around. I was looking through the incarnations of the official JMJ sites I've archived since 1997, it's been a few: 1997, 1998, 1999, 2004, 2005 (this one I have not complete), 2007, 2008 (I like this one, the Oxygene skull), 2010, 2014, 2016 and the one we have now. I might have forgotten some. I noticed I missed the one between 2016 and now, but luckily the web.archive.org site has it. Not much difference, except the navigation being on top instead on the left of the site.
I'm planning to do an "exhibition" of these sites one day. One problem is that the sites from 2007 and up use Flash and Flash has been shut down by Adobe and none of the webbrowsers support it now. This means these website incarnations cannot be viewed anymore. A shame. I'm reading things about plugins that will try to run Flash, but I don't know if this will be future-proof.