Silicon is one of the most attractive anode materials for all-solid-state batteries (ASSBs) because of its high theoretical capacity, low lithiation potential, and abundance. Over the past 2 decades, silicon-anode research in ASSBs has evolved from thin-film model systems to nanostructured three-dimensional electrodes, powder-pressed composite architectures, integrated nanosheet-based cells, and, more recently, high-loading application-oriented designs. Despite this progress, one challenge persi