For Disney, guest retention programs have become a major focus. Many travel professionals will tell you that Disney is working overtime to get guests to come back. These aren't ordinary guests who may go once every 4-6 years, these are repeat Disney guests who travel once or more per year who have turned their back at Disney. These guests are discovering that for the price of a week long Disney trip they can go to Europe or Asia or on a cruise for the about the same price if not less.
Luckily for Disney (for now) there is a sucker born ever minute who will pay for the non-discounted rack rate with dining plan.
Remember, guest retention is a trailing indicator. Strong return visits in 2020 means people had good experiences BEFORE 2020. If people are having bad experiences in 2020, you'll see guest retention slide in 2021.. etc.
And major damage to reputation can be impossible to repair. It took Coca Cola years to get back to where they were before New Coke.
Disney *might* be fooling themselves, looking at the full parks, and see it as evidence that all is healthy. The reduced hours are working, the parks are still full! See, cutting parades was no problem, the parks are still full!
I have to think, in the long term, there won't be sustainable demand for $600 hotel rooms paired with $20 hotdogs paired with a 3-hour line for every ride.
But who knows, Disney does market to a worldwide audience, they are trading on decades of a magical reputation. Maybe there are enough customers who are willing to suffer through massive crowds.
But to paraphrase Yogi Berra.. we may get to the point where, "nobody goes there anymore, it's too crowded"