For us, the line was crossed a while ago.
I liken the shift to the "frog in a boiling pot o' water" theory.
Things changed incrementally over the years as were saw it (prices increases exceeded inflationary comparisons; park improvement developments were slow in coming; and likewise, odd and painful crowd-management techniques were employed to deal with the stagnated offerings yet larger crowds; food qualities dropped off considerably; employees' attitudes-----while not universally worse----were not as good as they used to be, etc.)
It used to be that we dreaded the drive home from our WDW vacations, as the places we stopped at to eat were a noticeable "return to the real-world, less then WDW quality come-down," in terms of quality and service. That became less noticeable to us in later years.
We made a habit of traveling to WDW every year, at the same time of year. It was our main vacation of the year and something to look forward to very much. Even with our observations of less value-for-the-dollar, and decrease in good vibes while there, we overlooked that, as it was our place to experience our timeless favorites and escape the daily grind for a week.
The bean-counters took over too much. The "magic" (as it is referred to) was replaced with cost-cutting and lines.....much longer lines than historically (in our case, anyways) experienced. And the concept of scheduling ride or attraction experiences two months in advance (still an asinine concept to me....and antithetical to the idea of getting away from the real-world's time driven demands) becoming a standard practice.
Granted, we still feel a twinge of jealousy when our local friends go and visit WDW. But we also realize (and it is often reinforced upon those friends' return and reports) that the WDW of our younger days is gone. Replaced by an entity which, in our eyes at least, puts on a much less convincing mask of trying to conceal the profiteering with the customer experience.
Obviously, many people here are much more tolerant of the boiling water around them. And much more willing to pay skyrocketing prices for that hot-tub experience.