Seems like there is more stuff newly unavailable -
http://www.enworld.org/forum/media-lounge-off-topic/76014-classics-fantasy.html
Wouldn't this be an indication that it is NOT so much "we're no longer supporting older editions" as a case of "*shrug*, we broke the links and never bothered updating it"?
I mean, those articles were pretty much edition neutral....
Honestly, it seems more of a case of the web-team not updating links and/or simply pruning server space.