The Keys to the Kingdom tour for one.
The flags down Main Street have 45 stars on them. When Walt lived in Marcelino, There were only 45 states, and that flag was the official flag of the USA. But these are not subject to the rules, since there is only one official flag at a time.
The flags at the entrances to each park are the 50 star current official flag. Hence they are lowered each night.
Now Disney could be feeding its guests hogwash for all I know. But that’s what I learned when I did the tour.