I ended up pulling them up on the Wayback Machine, but still. Some of those articles were definitely out of date, but it's a treasure trove of historic and educational value. It's just sad to see them go. As for the customer support thing, I'll put in a ticket. I already got a partial answer, apparently the website format changed and updating all of the old articles was not done for one reason or another. As someone who has read them all, it is a weird smattering of preservation. They go back to 2014 but there's only a handful from each year.
Maybe they are getting updated and will return naturally, but I'm still wondering when they went missing.