In summary, several effective strategies have recently been proposed to mitigate the Li/SSE interfacial issue and extend the lifespan of SSLMBs. These approaches encompass Li or anode scaffolds, Li/SSE interlayers and SSE design, addressing the fundamental limitation of SSLMBs from various perspectives. The design principles, which involve multiple disciplines and interdisciplinary collaboration, cover aspects ranging from Li-metal nucleation and growth to interfacial contact stability. The success achieved thus far underscores the importance of interface engineering in solid-state systems and the efficacy of synergistic strategies. Future research should focus on SSLMBs capable of operating within a wide temperature range, especially below 0 °C, and at low stacking pressures, to expedite the commercialization of SSLMBs.