The good thing about a collaborative effort is the majority of the knowledge still exists in the community. Sure some time is lost putting the information back into an easy to find location, but it can be done.

This is also a reason the wiki on this site should be utilized more, then the efforts of many are actually a part of the site and not a part of one individuals history.

Ya 100's of pages of history may be gone, but knowing what we know now it won't take that many reiterations to get things right. If there was something you really liked and miss ask the questions and help the effort to get the information back out there. There is no reason to give up because it became a touch more difficult.