If the RSC does die, and all the data is lost, there's no reason another one couldn't / shouldn't be started. Started in a way that this would never happen again. It would take a long time, but some of the data could be re-introduced to the new site. It would be better than nothing.
That's not far from what others have proposed.
Start a new more secure modern version from scratch & archive the old in a form that would allow reading but no further additions.
That way not only the tech sections but the threads will still be readable - I believe that's where the really deep info is.
To illustrate that point - how long ago did Dchopper do his fat tire conversion in a stock swingarm with extensive documentation and pictures ... but it never made it to the tech section?
There are literally hundreds (thousands?) of discussion threads like that & there's no way to put all that on a DVD unless you made it a 2500 disc set.