Which major retail trend regarding store size emerged among successful retailers during the 2010s?

The retail industry has undergone significant transformations in recent decades, particularly in how brands utilize physical space. As e-commerce has grown, many retailers have strategically adjusted their brick-and-mortar footprints. This trivia question explores an interesting trend in the relationship between retail success and store size that emerged in the 2010s, challenging conventional wisdom about bigger always being better in retail.

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The 'Small Box Revolution' - reducing average store footprint by 20-30% while maintaining or increasing sales per square foot
The 'Flagship Expansion' - doubling the size of key locations while closing smaller satellite stores
The 'Megastore Mandate' - consolidating multiple smaller locations into fewer, much larger stores
The 'Variable Sizing Strategy' - dramatically different store sizes in urban vs. suburban locations