#Sciop hit a Petabyte (actually a Pebibyte but nobody knows that word) of total proven capacity a week or two ago. That's all the seeders * the size of the things they are seeding. All volunteers, zero dollars in funding, piggybacking off existing resources wherever we can, run on a donated VPS. This is before we even get into federating archives and are still nailing down the basics of the site.
Peer to peer archives are real and they work, period. 216TiB of threatened cultural, climate, queer, and historical information held in common. That's a people powered archive, and you're welcome in it - to take from, to add to, and help sustain if you can.