"White collar criminals only get sentenced close to the statutory maximum when (1) they are only convicted of one or two counts with very low statutory maximum (say, one count of a crime with a five-year statutory maximum, as part of a plea bargain), or (2) cases involving truly extraordinary amounts of money."

Unlike the Trump case the article discusses, this case involves a truly extraordinary amount of money. Prosecutors did indeed ask for half that, but the court gave only half of the (already lenient) request due to facts about the person who was convicted.

Note that the Madoff case involved a similar amount of money and he indeed did get the big sentence. I suspect that was because he was likely to die in jail given any reasonable sentence, so better to make a show of it. In this case, SBF got a more lenient treatment for a similar offense because he is younger (note that the judge did not believe he has any remorse and still gave a lighter sentence).