CERT has always had a reputation that far outstripped its impact or contributions, and has in general been a force working against public disclosure. Serious vulnerability researchers have never relied on them, and my definition of "never" goes back into the mid-1990s --- when CERT and FIRST were really an activist effort to co-opt vulnerability research for the interests of large vendors.

I'm sure good people work there now, and they'll be fine. If all of CERT's public web presence goes away, I won't miss them.