As already said, with the changes nothing is set in stone. Last year we were able to use from 4-6, then from 6-7 it disappeared from the app but you could use a blue umbrella to schedule a return time for a ride. Then at 7 you could use again. The only thing we found it was needed for was 7DMT, early space mountain, and for Tron once we acquired a virtual que. Even all of those were only around 30 minutes during the actual party. There are some special character meet and greets that have very long lines that we did not attempt to do. I do not know about how or if
DAS worked with those. Again, who knows this year if there will be changes.