See up thread on the math done earlier. DAS shifting to SB has no impact. Zero sum. Conflating the double dipping Ideology some do to prove the first impact, is well in itself double dipping
I’m sorry but this is flat out wrong. I’ll give you four simple examples why, all perfectly “legal” under the Disney rules.
Person A gets DAS for Slinky, return in 2 hours. They do standby for Alien Swirling Saucers and Toy Story Mania while they “wait.” The SB line for both aliens and mania has just increased by 1 party. Therefore the standby wait for both of those rides just increased for everyone behind them, because otherwise Person A would not have been in that line.
Person B gets DAS for Tower of Terror, return in 1 hour/1pm. They wait out their hour while eating at the Sci Fi diner. If they hadn’t had DAS they would have still eaten at Sci Fi diner, but
then join the SB line, so they are an hour “behind” where they would have been otherwise. Instead of getting off at 1:15pm, they now get off at 2:15pm. Between 1:15pm and 2:15pm they could have done a different ride, thereby adding a body to the line (SB or LL), which, by definition, slows down that line.
Person C books a DAS for Rise in 90 minutes, waits out his/her time browsing in Galaxy’s Edge, and then after riding Rise gets a DAS for Smugglers in another 45 minutes. Without DAS, assuming that the party still wants to browse in Galaxy’s Edge, they enter the Smugglers line much later, or perhaps doesn’t ride Smugglers at all because they run out of “time."
Person D books a DAS for Runaway Railway and waits out his time at First Aid. Without First Aid they would have probably had to rest elsewhere, and would have entered the SB line however much later that they needed to deal with their medical needs. And entering the line at 11am vs. 10am means that there is now 1 hour less that they could have been riding other rides.
Does every DAS user do this? No, of course not. And in no way am I condemning the DAS program. But to pretend that it doesn’t ever happen is disingenuous. Every time someone is in 2 places at once the effect will cascade though the rest of the day because it makes their particular day go faster than it would otherwise, or allows the guest to do more than they would be able to without it.
Also before you say “but a non-DAS guest can do so much more” I’m not arguing that is true or not. But it is a fact that the DAS user can accomplish more with DAS than
they would be able to without DAS (even if that just means that they can ride 2 rides in a given day vs. 1), which then of course impacts the total aggregate wait of all standby lines across the park.
If there were only 1 DAS party, or even 100 DAS parties (like VIP tours) the impact would be negligible. And none of us knows the true number of DAS guests in the parks at a given day. But Disney certainly does, and Disney has decided that the impact to park operations is great enough that a change needed to be made.