https://www.cruisehive.com/could-carnival-cruise-line-be-removing-the-virtual-muster-drill/68356
Interesting read...and I refuse to blame "spring breakers" either. In the old days, we've all seen so called adults slowly strolling to their outside muster station (usually with drink in hand) while everyone else was sweating in the sun. The "new" drill eliminates all that, but apparently thats too much effort too. Might have something to do with ships ability to deal with 6k passengers doing it.
Either way, scan down to some of the possible alternatives...interesting eh?