In all previous versions it was possible to use the On Enter event of a quiz slide as trigger. Not the On Exit, because that functionality was taken over by the Success/Last Attempt actions.
I use this event all the time in Captivate Classic. It is even more needed in the new version, due to the many required workarounds. One example:
I have answered already multiple times the request to get rid of the feedback messages in the New version on quiz slides. It is a lot of trouble compared with Captivate Classic, by making the states in the multistate object visually invisible. But there is no way to control the second step of the submit process (Press Y or click....) as in older versions. I want to play an audio clip On Enter to warn about that. Impossible. I can offer you lot of examples where this event (now named trigger) is very useful.