One of the reasons that cybersecurity and information security are so important is that a breach leads to never-ending complications. Hillary Clinton's decision to use a poorly-secured email server in her house, compounded with her "extremely careless" handling of classified information, will bedevil her for the rest of her life -- and cause harm to America for far longer.
There's no way for anyone to know if or when the last shoe has dropped. Hillary could be blackmailed at any time -- with real or fake email dumps. America's allies and enemies can be manipulated or threatened. Information that leads to "exceptionally grave damage" to national security can be exploited secretly by our enemies without our knowledge.
The fallout of Hillary's "extremely careless" decisions will continue to harm her and America for decades.
In all likelihood, there are many foreign governments and perhaps many private parties who were able to gain access to the Clinton homebrew server. Any one of them at any time could dump more information that will be impossible to ignore. No one knows what that information will be, but it is certain to embarrass both Clinton and the United States, and perhaps compromise our allies as well.