this is incredibly sad, all that knowledge, just burned away... :(
The good news is that it looks like there will be/is a substantial effort to archive, so as I said most of the content will probably end up being saved in SOME fashion. But that's still only of limited use of it's difficult to find on a search engine, and if there's no ongoing community hub for NEW discussion and content. They are working on that as well though. We'll see how it goes.