Unable to afford physical components, Steve Wozniak spent years designing computers on paper. This constraint forced him to compete with himself to use the fewest possible parts, a skill that became a critical competitive advantage for Apple's early, cost-effective hardware.

Build products on simple, foundational concepts rather than complex, rigid features. These core building blocks can then be combined and layered, leading to emergent complexity that allows the product to scale and serve diverse needs without being overwhelming by default.

CEO Jared Bauer applies a core lesson from his time at Apple to biotech: focus on the user experience, not the technical specifications. Instead of highlighting 'how fast the RAM is,' Apple focuses on what it enables, a principle he uses to guide product development.

To enforce its "the best part is no part" philosophy, SpaceX has a rule: if you aren't adding back at least 10% of the requirements you previously deleted, you aren't being aggressive enough. This counter-intuitive metric ensures engineers continuously question and simplify designs.

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.

Design is often mistaken for aesthetics, like choosing a border radius. Its real function is architectural: defining the simplest possible system with the fewest core concepts to achieve the most for users. Notion's success, for example, comes from being built on just blocks, pages, and databases, not from surface-level UI choices.

Instead of focusing on adding more features, the best product design identifies a desired outcome and systematically removes every obstacle preventing the user from achieving it. This subtractive process, brilliantly used for the iPhone, creates an elegant user experience that drives adoption and retention.

The default instinct is to solve problems by adding features and complexity. A more effective design process is to envision an ideal, complex solution and then systematically subtract elements, simplify components, and replace custom parts. This leads to more elegant, robust, and manufacturable products.

Inspired by a Steve Jobs quote, YC partner Garry Tan looks for founders who obsess over details others won't see, like a carpenter perfecting the back of a cabinet. This unseen craftsmanship, like a smooth UI scroll, signals deep product taste and commitment.