Great post Alicemouse.
For us, it's a combination of things. Our dollar is worth 30 cents less, the prices have gone up, and our experience has deteriorated. We've had some unexpectedly bad experiences with housekeeping, rude CMs (not with us, but it's just as unpleasant to witness uncalled for rudeness directed at other people), and also a level of rudeness/entitlement with guests that is jaw-dropping. Although not entirely Disney's fault, their failure to address guests horrible behaviour tells us that they don't care about OUR experience enough either.
I know a lot of people love FastPass+, but I'm not one of them. It's increased lines for rides that were traditionally walk-ons, and made it very difficult to do multiple rides on favourites. I also do not want to plan my entire trip down the the smallest detail six months in advance. I didn't mind making dining reservations that early, but having to book rides/experiences that far out is ridiculous. Air travel is increasingly unpleasant, from the security/border officials to the ever smaller spaces on the planes.
We've had enough, and decided to keep our money in Canada. We've just returned from a trip to Quebec City that was delightful and relaxing, and plan on seeing more of our own country next year. Our son wants us to go with them in 2 years to introduce our new grandson to WDW. We will go, because grandson! But I fear we won't enjoy it as much as we used to. Our DIL has never been, and I am afraid she will not get the experience she has heard us all talk about either. I know changes will happen. They should happen. But the changes in the past few years seem to diminish the experience, rather than enhance it.
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Diana
Time marches on. Eventually you realize it's doing it across your face.