In "SharePoint Overflow joins the Stack Exchange 2.0 family", it is stated that "we will re-add some of the best quality content from the old site". Perhaps it isn't phrased accurately, but this sounds like much less than 50% of content will be migrated.
However in our Area 51 proposal discussion, it was stated that "Questions, answers, comments all transfer" (emphasis mine).
I'm quite concerned that the SharePoint community (both on this site and as a whole) loses content because of this migration. Sometimes just one question and answer can be pure gold! Then there's the amount of time people put into their posts that could end up 'for nothing'.
It also wouldn't be nice to see our users lose reputation (beyond what may occur with vote value changes in Stack Exchange 2.0) or badges.
Can this please be explained? Also, how will the quality level be determined?