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This is the same idea behind binary search. In a sorted array, you compare against the middle element and eliminate half the remaining candidates. In a quadtree, you choose one of four quadrants and ignore the other three regions. Each level narrows the search space by a factor of four instead of two.
In 2022 Los Angeles County had 145,000 workers in the motion picture industry, according to the Bureau of Labor Statistics. In 2024, the most recent year for which data is available, it was 104,000. One reason is decades of consolidation—deals like this one, most of them involving layoffs. When Paramount merged with Skydance last year, it laid off about 15% of its workforce, about 2,600 employees.