A lot of that stuff could be reused. Tempered sheet glass that size is very expensive. It's not worth much any more but that's not the point, someone could and should use it. Repairing and reusing materials is labour intensive and expensive, that's why builders don't do it, until we insist they do it.

They'll build another shopping center with a few tallish buildings on them for residency+offices and a community center as well so I think they might reuse stuff? im not sure how it works