Amadeus reinvests heavily in R&D, with a spend equivalent to its #3 competitor's total revenue. This creates a widening technology and product gap that smaller players cannot bridge, fortifying its market leadership and making it increasingly difficult for others to keep up.

While high capex is often seen as a negative, for giants like Alphabet and Microsoft, it functions as a powerful moat in the AI race. The sheer scale of spending—tens of billions annually—is something most companies cannot afford, effectively limiting the field of viable competitors.

Unlike traditional SaaS where a bootstrapped company could eventually catch up to funded rivals, the AI landscape is different. The high, ongoing cost of talent and compute means an early capital advantage becomes a permanent, widening moat, making it nearly impossible for capital-light players to compete.

The moat for a market leader isn't just the initial VC investment; it's the subsequent, rapid follow-on rounds that create a 'wall of money.' This forces competitors to prove they can win against not just a brand name, but also a massive and compounding capital advantage.

Tesla's most profound competitive advantage is not its products but its mastery of manufacturing processes. By designing and building its own production line machinery, the company achieves efficiencies and innovation cycles that competitors relying on third-party equipment cannot match. This philosophy creates a deeply defensible moat.

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.

New chip fab ventures face immense hurdles because fabrication is less like following a manual and more like mastering a recipe through decades of trial and error. This accumulated, non-transferable knowledge, likened to "cooking," creates a significant moat for incumbents like TSMC.

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.

True defensibility comes from successfully navigating successive challenges that weed out competitors. Many have an idea, fewer can build it, even fewer can maintain shipping cadence and distribution, and only a handful can raise capital at scale, leaving a 2-3 horse race.