Of my all-time favorite 10 WDW attractions, I think more than half are gone or heavily diminished.
It's a peculiar thing for me. Among the Old Classics, the ones I'd be fine with losing are the ones DisCo tends to keep around: Small World, Jungle Cruise, Tiki Room, Country Bears, Carousel of Progress, The Land at EPCOT...
The ones I consider untouchable always seem to get marked for execution (e.g., Horizons, World of Motion, GMR, Maelstrom) or diminishment (Living Seas, Kilimanjaro Safaris, Spaceship Earth, Space Mountain, Everest). My favorite ride type is the long-form, pre-recorded spiel, Audio-Animatronic experience that aims to inspire and enrich as well as entertain - in that earnest, non-hip Old Disney way. That era is over, sadly for me, and that ride type is almost extinct.
Surviving favorites like HM, ToT, Pirates, TSI, Big Thunder, Star Tours, Peoplemover, American Adventure or new Ride-the-Movies experiences aren't enough to overcome the massive change in Quality/Cost ratio.
So we don't go to WDW anymore.