It's tough to differentiate personal mall patronization patterns from population-wide patterns. As people age, their daily need for new stuff goes down. So everyone thinking of their own experiences says 'sure, I go less than I used to.'
That is, unless they are hauling kids there, or otherwise going there to get things for an expanding family.
It's tough to argue with the logic, though, that the virtual environment has replaced the mall environment, both as a place to gather for leisure and a place to obtain consumer goods.
Between Amazon and Facebook [ie, online shopping and social media], there's less of an imperative to go somewhere for either socialization or consumerism.
And things are moving fast, too. 15 years ago, St. Louis Mills was brand new. 2-3 years ago, I went there during the holidays and it was packed. It's been closed [or nearly so] for over a year, and part of it is soon to be converted to a church facility.
Edit - right at 2 years since it's nearly closed
https://fox2now.com/2016/09/07/haunt...is-mills-mall/
Check out how huge and new and clean, . . and empty