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.

Wozniak's insistence on eight expansion slots for the Apple II, against Jobs's preference for two, created a third-party ecosystem that drove sales. This open architecture's success funded the company, enabling the development of Jobs's later closed-system products.

A company with modest growth experimented with niche content for a small user segment, revealing a massive, underserved market. This led to a second, separate app that quickly surpassed the original product's revenue and drove hyper-growth, challenging the "focus on one thing" dogma.

The founders were building a new UI for their own internal software. It was their external marketing firm, not them, who recognized the tool could be packaged and sold as a standalone modernization product, which became their flagship offering.

While the goal is to build a platform (second-order thinking), initial single-purpose app ideas (first-order) are critical. They serve as your "golden evaluation set"—a collection of core use cases that validate your platform is solving real user problems and is truly useful.

The Apple III was a commercial disaster because its design was finalized by marketing and Steve Jobs's aesthetic vision before the engineering was proven. This approach, which forced engineers to cram immature tech into a small case without fans, was the exact opposite of the engineering-first process that made the Apple II successful.

Driven by a philosophy that engineering is the highest calling, Steve Wozniak never wanted to manage people or run a company. His primary motivation was to stay a hands-on engineer at the bottom of the org chart, a counter-cultural mindset that shaped his design choices and his relationship with Apple.

Wozniak firmly believed that revolutionary products are not invented by committees. He advised inventors to work alone, comparing the process to art. This solitary approach, free from corporate bureaucracy and marketing-driven compromises, allows for the creation of truly novel designs without dilution.

Major technological shifts create new industries in unpredictable ways. The spreadsheet automated manual financial modeling, revealing massive inefficiencies in companies. This enabled private equity firms to acquire businesses, streamline operations using this new tool, and extract value, effectively birthing the modern PE industry.