I think that’s an important criteria for Staff-plus Engineers in product: not to just build something that ships, but for it to roll out smoothly and continue to succeed and grow over time with as few regrettable choices as possible. There will always be corners cut and features descoped during product development, especially for new products. A Staff product engineer makes those product and technical choices deliberately, taking on various different user personas to make the best choice possible and documenting rough edges thoroughly for future engineers.