There's also Archive Team, focused on preserving at-risk sites before being taken offline.

https://wiki.archiveteam.org/

I'm not familiar with r/datahoarder, but if the name bears any significance, it seems they are mostly centered on hoarding data, which means just digital I guess? If so, I much rather would want to promote efforts like Internet Archive that back up all kind of things, not just digital data.

What does the Internet Archive back up that isn’t represented by 1s and 0s?

A ton of 35mm and 16mm film reels, vinyl, and even wax recording, physical books and a lot more. They make digital copies of them, but they also archive the physical versions as well. Here's a selection of the movies: https://archive.org/details/moviesandfilms?tab=about

The Physical Archive. https://en.wikipedia.org/wiki/Internet_Archive#Physical_medi...

Promote both, rest easier.