The actual reason why is that everyone was expecting Hillary to win and she had vowed to “end private prisons.”
So everyone was calculating in a 90% or whatever chance Hillary wins, with some percentage chance she actually fulfilled her promise. Instead they got a 100% chance they would stay around for 4 years and probably get a tax cut. Pretty big adjustment is appropriate.
(Also old 2016 articles about Hillary are so quaint. They even mention Obama closing Guantanamo lmao)