Yeah the time capsule thing is a big part of its value to me. I will never forget how disappointed I was when the "Macintosh" group disappeared. I think at some point I actually chatted with someone who worked at Flickr and explained that the group owner simply closed it at some point (can't remember 100%). It had so many photos going back to basically the earliest days of Flickr, of all kinds of awesome photos of Mac computers of all eras, not only new digital photos but tons of stuff people posted from prior decades. The other Mac/Apple-related groups were not as comprehensive. That was good while it lasted, at least. I wish there was some way to re-open the group :\

EXIF data enabled some pretty cool things, like PhotoSynth [1]. This stuff looks futuristic even now, ~20 years later, basically what the Metaverse could/should have been.

[1] https://www.ted.com/talks/blaise_aguera_y_arcas_how_photosyn...