Brands don't die from competition. They die from incoherence.

Think about a brand you used to love that you now feel nothing about. Yahoo. Tumblr. WeWork. What happened? It wasn't that a better competitor appeared overnight. It's that the brand gradually lost the thread of what it was.

Yahoo started as a directory. Then it was a search engine. Then a media company. Then a tech company that was also a media company that also did email and fantasy sports and bought Tumblr. By the end, nobody — including people who worked there — could tell you what Yahoo was.

A brand is a promise. Not in the corny brand-strategy sense. (It's actually closer to positioning — an active, ongoing commitment.) In the literal sense that when people hear your name, they expect something specific. Google means search. IKEA means affordable furniture you assemble yourself. Patagonia means outdoor gear made by people who care about the environment. These brands are alive because the promise is clear and consistently kept.

Brands die when they break the promise. Not once — people forgive mistakes. They die when they break it so many times, or dilute it so much, that the promise becomes meaningless.

The mechanism is always the same. The company gets successful. Success brings resources. Resources bring opportunities. Opportunities lead to expansion. Expansion leads to doing things that don't fit. Each individual expansion makes sense in a spreadsheet. Together, they dissolve the brand.

Gap is a good example. In the '90s, Gap meant something: affordable, classic American basics. Khakis, white tees, clean denim. Then they chased trends. Then they launched sub-brands. Then they redesigned the logo. Then they redesigned it back. Now Gap means nothing. It's a store at the mall where you might find something, or might not. There's no reason to go there specifically.

The tragedy is that brand death is almost always self-inflicted. It's not that customers leave because they found something better. It's that the company gives customers no reason to stay. Every "strategic pivot" and "brand refresh" and "expansion into adjacent markets" is a tiny cut. None of them are fatal alone. Collectively, they bleed the brand dry.

The lesson is that a brand is not an asset you exploit. It's a relationship you maintain. And like any relationship, it dies when you stop being who you said you were.

The companies that survive long-term are the ones disciplined enough to say no. No, we don't do that. No, that's not who we are. No, even though we could make money doing it, it would confuse what we stand for. This is another way of saying your customer is not everyone.

That kind of discipline is rare. Which is why most brands die.