As of early November 2025, two developments pushed solid‐state batteries toward commercialization: NEO Battery Materials unveiled the P‐300 silicon anode—a metallurgical, micron‐scale silicon with polymer coatings aimed at improving interface stability and reducing fracturing for solid‐state systems in space and eVTOL applications—and ProLogium showcased its fourth‐generation all‐inorganic solid‐state lithium cell at IAA Mobility 2025 and outlined European mass‐production plans. ProLogium’s Taoyuan gigafactory has shipped over 500,000 cells, and it targets a Dunkirk, France plant producing 4 GWh by 2029 with full mass production by 2030. These moves matter because they address longevity and scaling barriers, accelerate adoption first in high‐value aerospace/eVTOL and then premium EVs, shift supply‐chain capacity to Europe, and bring regulatory and commercial incentives into play as the technology moves from R&D to scaled manufacture.