I've been saying for a while that Hillary Clinton's use of a private server was a rational decision considering the state of government IT systems.
On Nov 4th This American Life (NPR) explained the facts (podcast) uncovered by the FBI's report. The scandal is that the State Department has all along been shockingly behind even average Americans in the area of IT.

Unfortunately she can't criticize the state of government systems for political reasons or to avoiding criticism for not trying to get them fixed herself.

I have some experience with IT security, working in that area for several years. I've given talks in Wash DC as part of a program on telecom and Internet security we did in conjunction with the Chesapeake and Patomic Telephone (C&P) company. There ware lots of people running around with name badges saying "government employee". The C&P people said they worked for 3 letter agencies in the fed. government. They said the Govt. had some problems.

I know several people who work on government IT systems when I was AT&T's representative on the American National Standards Committee for office systems and email. One of our members who worked for large government contractor set up a private server for us because the government systems were so bad.

The NPR program today talked about how Colin Powell was given a dial-up modem in his state department office when he became secretary of state in 2001. My neighbor who worked in IT had a T1 private data line to their house around the same time.

Powell was abhorred with the sad state of affairs of State Dept (DOS) computers. Many employees used their own systems because of this. You couldn't print on the DOS computer system so people emailed documents they wanted to print to their private systems and printed them from there.

The wi-fi on DOS computers was incompatible with the Air force system, so when they traveled on Air force 1 they used their own systems.

Powell ordered something like 16,000 new computers for DOS employees so they could get up to speed. When he visited an embassy he made a point of trying to use their systems to communicate back to Wash. to make sure they were working correctly.

I'm sure they are better now, but as recently as 6 or 7 years ago a former colleague who now works for the Fed. Govt said things were still behind the times.

Links:
What Really Happened With Hillary's email?
NPR podcast