Industrial gases are essential for manufacturing, making failure catastrophic for customers. However, they only represent 1-2% of a customer's total costs. This combination of high failure cost and low relative spend creates an extremely sticky customer base with very low price sensitivity.

GE serves two distinct customers: powerful airframers for the initial sale and a fragmented base of hundreds of airlines for aftermarket services. This split forces new entrants to solve a '3D puzzle' of satisfying both technically demanding OEMs and a global user base simultaneously, creating an immense and durable barrier to entry.

Unlike typical asset-light software companies, Cloudflare's capital-intensive model of owning physical infrastructure is a core strategic advantage. This CapEx builds a global network that is extremely difficult for competitors to replicate, creating a durable competitive moat through owned infrastructure.

Investor Henry Ellenbogen favors two types of competitive advantages. First, hard-to-replicate physical assets like distribution networks, which are messy and time-consuming to build. Second, “soft” moats built on elite human systems for talent development, operational excellence (like the Danaher Business System), and sharp capital allocation. These are harder to see but just as powerful as physical scale.

Less-than-truckload (LTL) carriers like Old Dominion build moats through extensive physical networks of service centers. A key barrier to entry for competitors is real estate; ODFL's legacy locations are in dense population centers, while new entrants face "Not In My Backyard" (NIMBY) opposition, forcing them to build further out.

The defensibility of complex hard tech companies doesn't rely on a single patent or technology. Instead, their moat is "novel in the aggregate"—the difficult-to-replicate integration of dozens of complex systems across design, manufacturing, supply chain, and regulation. This holistic execution is the true barrier to entry.

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.

Sustainable scale isn't just about a better product; it's about defensibility. The three key moats are brand (a trusted reputation that makes you the default choice), network (leveraged relationships for partnerships and talent), and data (an information advantage that competitors can't easily replicate).

A durable competitive advantage, as defined by lessons from Amazon's Jeff Bezos, is an edge that persists even if a competitor woke up tomorrow and perfectly copied your strategy with equally talented people. Amazon used its early cost advantage to build physical fulfillment centers, creating an infrastructure lead that became impossible to close, even once the strategy was obvious.