Design success isn't just about creating a functional and appealing product. The ultimate measure, often forgotten, is market adoption and usage. A designer's responsibility extends to ensuring the product sells and is used by customers, making it a business-critical function.

Designers once felt like imposters, but the profession grew rapidly, championed by figures like Steve Jobs. Now, design has a "seat at the table" and is recognized as a critical differentiator and a core business process for problem-solving, not just aesthetics.

The core job of a software designer is to make products that look good and work well to drive sales, a principle from industrial designer Henry Dreyfuss. This requires a holistic understanding of users, the medium, and business impact, mirroring the original practice of industrial design.

Don't design solely for the user. The best product opportunities lie at the nexus of what users truly need (not what they say they want), the company's established product principles, and its core business objectives.

True product excellence lies in details users might not consciously notice but that create a magical experience. Like Jobs' obsession with internal aesthetics, these small, polished edge cases signal a culture of craft and deep user empathy that is hard to replicate.

As AI makes software creation faster and cheaper, the market will flood with products. In this environment of abundance, a strong brand, point of view, taste, and high-quality design become the most critical factors for a product to stand out and win customers.

AI tools are dramatically lowering the cost of implementation and "rote building." The value shifts, making the most expensive and critical part of product creation the design phase: deeply understanding the user pain point, exercising good judgment, and having product taste.

True design isn't about aesthetics; it is the fundamental soul of a creation, revealed by how it works. It requires distilling a product or company to its simplest form through profound understanding. As AI automates coding, this ability to design systems becomes a critical skill for everyone, not just designers.

A design leader's responsibility extends beyond quality and execution to co-owning strategy with product. By leading a generative research function that looks 'around the corner,' design ensures the company builds the right products for the future, not just polishes current ones.