There's many rides that would leave me feeling like "something is missing" if they were closed during a trip, but nothing that would make me completely reschedule a trip.
I miss Splash when it's closed. I miss Grizzly. I really missed the train! I missed Tom Sawyer's Island. I've been sad to miss the Jungle Cruise.
But nothing that would make me reschedule a vacation. I plan/buy things to far out for that to be a consideration, unless (big unless) it's a long refurb with known dates.
..... The tragedies only get worse as they get older, hahahaha. At any rate, just wanted to thank you for the giggle this morning--it's been a tough week teen-drama-wise, and it's always nice too be reminded that kid-drama is nearly universal, and often over things that seem relatively minor to their adults. My daughter would have thought any ride down during our trip was a clear tragedy as well, especially at 9!