I don’t understand the change to elf trance. Why do they suddenly no longer need to finish the 8 hours?

http://ifttt.com/images/no_image_card.png https://www.sageadvice.eu/2017/09/01/i-dont-understand-the-change-to-elf-trance-why-do-they-suddenly-no-longer-need-to-finish-the-8-hours/