In 2004, I was shocked as well, but it was more of a "Don't switch horses mid-stream (mid-apocalypse)" kind of feeling.
We are already seeing so many disappointed, vocal Trump voters who would not vote for him today. Of course, they'd probably back Jill Stein or write in Bernie.
I suspect plenty of the apathetic people are less apathetic now.
This is the LAST FUCKING TIME I ever want to hear "but the candidates are ALL bad" - grow a pair, sunshine. Put on your big boy undies and vote.