Excessive. It's not hard to take away his ability to do harm again, he is not a threat to society. In fact, put him to work righting all his wrongs. This judge and sentence a waste of taxpayer money.
"Four major goals are usually attributed to the sentencing process: retribution, rehabilitation, deterrence, and incapacitation. Retribution refers to just deserts: people who break the law deserve to be punished. The other three goals are utilitarian, emphasizing methods to protect the public."
Given the scale of fraud, the money involved, and the nature of SBF at trail, I would disagree.
https://www.ojp.gov/sites/g/files/xyckuh241/files/archives/n...