Netflix identified video rentals as an ideal market because the return logistics were fundamentally different from standard e-commerce. This complexity made the category unattractive to giants like Amazon, creating a defensible space for Netflix to grow in.

Home Depot succeeded by "counter-positioning" against incumbents like Sears. Their high-volume, low-price model was so different that if Sears tried to adopt it, they would have damaged their existing high-margin business. This strategic dilemma paralyzed competitors, allowing Home Depot to capture the market.

Walmart's resurgence to a trillion-dollar valuation wasn't just from low prices. The key was a massive, multi-billion dollar investment in its e-commerce and delivery infrastructure. This enabled same-day delivery to 95% of US households, effectively neutralizing Amazon Prime’s core competitive advantage and winning back market share.

Scale creates a powerful barrier to entry in logistics. A dominant provider with a vast network can add a new, specific service (like pallets for celery) to its existing operations far more cheaply than a new competitor could build a network for that single service, effectively locking out competition.

With the DIY consumer market stalled due to the housing gridlock, Home Depot is shifting its focus to professional contractors and builders. The company is actively acquiring wholesale distributors to cater to this B2B segment, which now accounts for half of its revenue, as a strategy to maintain growth.

Home Depot's competitive advantage wasn't just its warehouse model; it was staffing stores with former plumbers, electricians, and carpenters. This provided customers with expert advice that competitors using standard retail labor couldn't replicate. The stable job with regular hours was also an attractive alternative for aging tradespeople.

When a Home Depot store became too successful and couldn't handle more volume, the company's solution was to open another one nearby. This self-cannibalization strategy allowed them to capture total market share, ensuring customers bought from a Home Depot, even if it meant stealing from an existing location.

Chewy succeeded against Amazon by creating a specialized, high-service experience for pet owners, an emotional category where a generic "everything store" approach falls short. This tailored focus on customer care and phenomenal retention created a defensible moat.

Home Depot became the default shopping destination for so many customers that manufacturers faced a choice: sell through Home Depot or lose access to consumers who wouldn't seek them elsewhere. This created a powerful network effect where scale attracted key suppliers, which reinforced customer loyalty and solidified their market dominance.