I really like the NOBL team’s focus on Culture/Market fit in their article The Only Thing More Important Than Product/Market Fit:

Find yourself a healthy market, yes. Then develop a culture that can deliver product/market fit. Your culture is what produces your products and services. You know you have culture/market fit when both talent and customers flock to your company for who you are, even above what you make. You know you have product/market fit when legions of customers buy your product.

Without culture/market fit, sustainable product/market fit (at any size, scale, or maturity) is impossible.

They go on to describe four competing flavors of organizational culture, each with unique traits and competitive strengths.