We’ve downloaded the 10 TB of arxXv … just in case … and are looking into building a proper dark archive arXiv.
Read about the why and what in a recent blog by TIB (npub1268…u2k4) colleagues Esther Tobschall (npub1d2k…7gyy) Holger Israel and me
https://blog.tib.eu/2025/05/14/protecting-science-tib-builds-dark-archive-for-arxiv/