I get what you guys are saying, but the two newest and hottest rides, both of which have partial capacity causing inflated wait times, being busy into the evening does not equate to the rest of the park being busy. An hour before close yesterday, the average wait time in the park with those two inflated waits included was only 15 minutes. You can look at the ThrillData link
@Brian G. posted and see day-by-day, there's a noticeable dip in waits just around 2 hours before park close. They're not just shutting down at 7 PM for fun. Like
@SeventyOne said, if there was money on the table for them to stay open later, they'd be taking it.