Running some local photo sharing sites in Europe myself, with tens of millions of photos, I would say people rarely open the originals or anything larger than 2

Running some local photo sharing sites in Europe myself, with tens of millions of photos, I would say people rarely open the originals or anything larger than 2048. Originals make sense only for historic archiving and paper prints. 99% of users never look at anything larger than what fits on their screen. Most photo sites keep the originals for future upscaling though, I would assume Facebook has done this as well? Storage is cheap. Even Youtube I believe has kept all the originals uploaded, even when they offered crappy low-res videos on the site. Correct me if I'm wrong.