Founders should abandon the idea of 'finding' product-market fit as a one-time event. Treat it as a state of constant refinement. The moment you believe you've achieved it, you start 'resting on your laurels,' which is the most dangerous place for a startup to be.

In fast-moving industries like AI, achieving product-market fit is not a final destination. It's a temporary state that only applies to the current 'chapter' of the market. Founders must accept that their platform will need to evolve significantly and be rebuilt for the next chapter to maintain relevance and leadership.

Initially, customers often "round down," focusing on missing features. A key sign of product-market fit is when they start "rounding up"—their faces light up in demos, and they imagine the product's future potential, forgiving current limitations because they believe in the core value.

To sustainably increase product-market fit, dedicate half your resources to doubling down on what users already love and the other half to removing what holds others back. Only fixing problems erodes your magic, while only building new features fails to expand your market.

When a startup finally uncovers true customer demand, their existing product, built on assumptions, is often the wrong shape. The most common pattern is for these startups to burn down their initial codebase and rebuild from scratch to perfectly fit the newly discovered demand.

Doppel's founder argues PMF must be re-established with every pivot, platform expansion, or new market entry. For modern SaaS companies building platforms, founders must earn PMF for each new product they ship, treating it as a constant, iterative process.

PMF isn't a fixed state achieved once. It's a continuous process that must be re-evaluated at every stage of growth—from $1M to $1B. A company might have PMF for one scale but not for the next, requiring a constant evolution of strategy and product.

Success in startups requires nuanced thinking, not absolute rules. For instance, product-market fit isn't a simple 'yes' or 'no' checkbox; it exists on a spectrum. Learning to see these shades of gray in funding, marketing, and product strategy is a hallmark of a mature founder.

Scaling a company isn't linear. Founders first achieve Product-Market Fit. The next stage is "Company-Market Fit," building organizational structures for growth. Crucially, they must then cycle back to reinventing the product to stay ahead, rather than just managing the machine they built.