alt Hacker NewsBugtraq had ceased being relevant at least a decade before it was shut down; it's kind of hard to see what place it could hold now. When it started, vulnerability research was a tiny niche, and disclosure was still a live debate; the norms today are totally different.
Yet today, there's not many places to find open discussion and disclosures that otherwise would have seen the light of day in this age of "ethical hacking".