The European physical journal / Plus 138(2), 158 (2023). doi:10.1140/epjp/s13360-023-03720-z special issue: "Focus Point on Accelerator-based Photon Science Strategy, Prospects and Roadmap in Europe: a Forward View to 2030 / guest editors: R. Abela, T. Tschentscher, J. Susini, G. García"