I know this is a Disney board, but this doesn't surprise me at all. I have actually been on the boards since the late 1990s although I didn't post much back then. From then through the early 2000's, I thought the parks were nice, they had new attractions, things were clean, the hotels, nice. Heck, even the food could be good at certain restaurants - this was all way before free dining.
For the record, I am currently 49.
Then, I didn't go tot he parks for several years, with the exception of a couple of day visits when visiting my MIL. However, I have been going for work to attend our annual partner meeting for the past few years and again in 10 days. We alternate between the Grand Floridian and the Yacht Club. All I can say is even though the company is paying, I am really not wowed by much anymore. Quite frankly, the Marriott in South Park in Charlotte has more comfortable and less dated rooms, in my opinion. Things just seem stale. I feel this way about the parks too.
We regularly go to Italy. My summer vacation there per night with fabulous food and wine was a fraction of the cost of going to Disney.
I know others continue to love it and go often. I am just explaining how I feel and I guess I can see how it may have lost it's luster for others too.