I can't understand why there isn't inertia behind restarting ia.bak or similar efforts. That seems critical to me, way more so than an official mirror which would be vulnerable to the same takedown and other pressure.
4 data centers, 745 nodes, 28,000 spinning disks
Wayback Machine: 57 PetaBytes
Books/Music/Video Collections: 42 PetaBytes
Unique data: 99 PetaBytes
Total used storage: 212 PetaBytesSee Filecoin Foundation and their work with IA.
Overall, Its just a giant archive, its hard to store that much data in a cheap manner that will last 20 years.