Designer: "What I like about our engineering principles is like at the top line, they do sort of sound like truisms until you read the actual trade-offs" Designer: "We will trade off performance, financial cost, and perfect product abstractions to keep our solutions as simple as possible" Follow full follow fundamentals. The principle by which we design UI effectively. We're not trying to like design new types of UI or like Tinder or like people who've come up with these radically different ways.