Superdelegates existed in 2008 as well. They were mostly in Clinton’s camp, but when Obama got ahead in the primary voting, not even anywhere close to as big a margin as Clinton had over Sanders, they switched. https://www.theguardian.com/world/2008/feb/23/uselections2008.barackobama

When she ultimately lost the primary, she threw her support behind Obama in the general election. https://www.c-span.org/program/american-history-tv/senator-hillary-clinton-2008-convention-speech/194032