Can you flux weld mild steel?

As a professional in the field of welding and materials engineering, I'm curious to know if flux welding can be effectively applied to mild steel. Flux welding, also known as flux-cored arc welding, utilizes a consumable tubular electrode filled with flux and wire. This process is often chosen for its high deposition rates and ability to weld thicker materials. However, given the unique properties of mild steel, such as its ductility and weldability, I'm wondering if flux welding is indeed a suitable technique. Could you elaborate on the feasibility and potential challenges of flux welding mild steel, considering factors like weld quality, efficiency, and cost-effectiveness?