The exploration of post-Lithium (Li) metals, such as Sodium (Na), Potassium (K), Magnesium (Mg), Calcium (Ca), Aluminum (Al), and Zinc (Zn), for electrochemical energy storage has gained significant attention due to the limited availability of Li and the higher theoretical specific energies compared to current Li-ion batteries. Post-Li metal|| sulfur (M||S) batteries have emerged as promising systems for practical applications. However, the insufficient understanding of cell parameters and sulfur electrocatalytic conversion mechanisms hinders their advancement. This perspective provides a comprehensive analysis of electrode parameters, including sulfur mass loading, sulfur content, electrolyte/sulfur ratio, and negative/positive electrode capacity ratio, to establish the specific energy of M||S batteries. It critically evaluates the progress in homogeneous and heterogeneous electrocatalytic approaches for sulfur conversion in non-aqueous Na/K/Mg/Ca/Al||S and aqueous Zn||S batteries. The article also offers insights into potential research directions for designing practical M||S batteries, emphasizing the importance of electrocatalytic materials in improving sulfur utilization and cell efficiency. Despite the challenges, the high theoretical specific energy of M||S batteries, such as 1682 Wh kg$^{-1}$ for Mg||S and 1802 Wh kg$^{-1}$ for Ca||S, makes them attractive alternatives to Li||S batteries for large-scale energy storage.The exploration of post-Lithium (Li) metals, such as Sodium (Na), Potassium (K), Magnesium (Mg), Calcium (Ca), Aluminum (Al), and Zinc (Zn), for electrochemical energy storage has gained significant attention due to the limited availability of Li and the higher theoretical specific energies compared to current Li-ion batteries. Post-Li metal|| sulfur (M||S) batteries have emerged as promising systems for practical applications. However, the insufficient understanding of cell parameters and sulfur electrocatalytic conversion mechanisms hinders their advancement. This perspective provides a comprehensive analysis of electrode parameters, including sulfur mass loading, sulfur content, electrolyte/sulfur ratio, and negative/positive electrode capacity ratio, to establish the specific energy of M||S batteries. It critically evaluates the progress in homogeneous and heterogeneous electrocatalytic approaches for sulfur conversion in non-aqueous Na/K/Mg/Ca/Al||S and aqueous Zn||S batteries. The article also offers insights into potential research directions for designing practical M||S batteries, emphasizing the importance of electrocatalytic materials in improving sulfur utilization and cell efficiency. Despite the challenges, the high theoretical specific energy of M||S batteries, such as 1682 Wh kg$^{-1}$ for Mg||S and 1802 Wh kg$^{-1}$ for Ca||S, makes them attractive alternatives to Li||S batteries for large-scale energy storage.