Power BI versus a dedicated ecommerce analytics platform is a decision that looks simple on the surface and gets expensive when you get it wrong. Power BI is a capable enterprise BI tool with strong data modeling and visualization features. But for a DTC founder who needs margin by channel, customer LTV by cohort, blended ROAS across ad platforms, and a 90-day revenue forecast, Power BI requires months of setup, a data analyst to maintain it, and per-user licensing that scales painfully fast.