I’m going to let you in on marketing’s dirty secret. For all our talk of seismic shifts and digital transformation, the entire industry is still propped up by a model conceived in 1898.
Yes, 126 years ago. Before the invention of the tea bag, the ballpoint pen, or the Ford Model T. St. Elmo Lewis, an American advertising executive, sketched out a neat little four-stage model called AIDA: Awareness, Interest, Desire, Action. We’ve been clinging to it ever since.
We’ve rebranded it. We’ve added acronyms—TOFU, MOFU, BOFU. We’ve stretched it, squeezed it, and contorted it to fit channels that Lewis could never have imagined. But the core, linear, top-down logic of the “marketing funnel” remains. And it is fundamentally, irrevocably broken. It’s a relic, a dangerously simplistic mental model that actively misdirects capital and talent in a world that has moved on. The agencies and CMOs still organising their world around it are charting a course to obsolescence.
The Digital Delusion: More Taps, Same Leaky Bucket
The arrival of digital didn’t kill the funnel. In fact, in many ways, it made the delusion worse. We just saw new channels—PPC, SEO, social media, programmatic—as new, more efficient taps to pour leads into the top.
The problem is that the bucket was, and still is, riddled with holes. Digital created a Swiss cheese customer journey, fragmented across a dozen platforms and devices. The funnel framework is utterly incapable of modelling this reality. It presumes a linear, rational progression from A to B. But people don’t move like that. They bounce. They get distracted. They see an ad on Instagram, search for reviews on Google, ask for opinions on a WhatsApp group, and then buy in-store three weeks later. The funnel sees none of this.
Take a giant like Marks & Spencer. They spend tens of millions on lavish, top-of-funnel TV advertising at Christmas to generate “Awareness” and “Interest”. Yet, for years, their online experience and in-store technology felt disconnected. A customer drawn in by the glossy ad might find the specific item is out of stock online, with no simple way to check local store inventory. They might abandon their cart online and receive a generic discount email a week later for a product they’ve since bought from a competitor.
Each of these moments is a leak. The marketing team is hitting its TOFU KPIs, the digital team is hitting its conversion rate targets, but the business is bleeding customers because the funnel creates data silos. It actively prevents a single, intelligent view of the customer journey. It measures the performance of the tap, not the integrity of the bucket. This isn’t a strategy; it’s organised inefficiency.
The AI Mirage: Glorified Automation in a Funnel’s World
Now, a new layer of delusion has been applied: "AI". Most of what is being sold as AI in marketing is nothing of the sort. It is, at best, basic machine learning or glorified automation executing the same broken, linear processes slightly faster.
Generative AI writing blog posts is a perfect example. It’s just a way to produce more top-of-funnel content, faster. It doesn’t ask if that content is the right asset, for the right person, at the right time. It’s just more noise, more volume to pour into the top of the same leaky system. Predictive analytics that tell you which customers are likely to churn are interesting, but they are not intelligent agents empowered to prevent that churn.
This is the critical distinction that most of the industry is missing. The revolution is not in doing marketing tasks more quickly. It is in creating systems that can think, reason, and act autonomously to achieve a strategic goal. It’s the shift from dumb automation to true agency. And this shift requires a new mental model.