Separating PMF signals from growing pains in a SaaS inventory-forecasting tool

[MiaR]

I'm a founder of an early-stage SaaS startup that helps small e-commerce businesses automate their inventory forecasting, and after six months of soft launch with about fifty paying users, I'm trying to rigorously assess our product-market fit. We have some enthusiastic customers, but our churn rate is higher than I'd like, and I'm struggling to differentiate between a fundamental mismatch and typical early-stage growing pains. For other founders who have navigated this phase, what were the most telling metrics or qualitative signals that confirmed you had found genuine product-market fit? How did you structure your conversations with both active and churned users to uncover the real "must-have" value versus nice-to-have features, and at what point did you decide to double down on scaling versus pivoting your core offering?