Some years back, I tried to take photos out of a random family album to scan them. The album was built so there was a plastic sheet in front of the photos, to hold them in place / protect them. Well, that sheet ended up ripping bits out of the photos, and it's glossy enough that I can't scan the photos through it. Be careful with assumptions of how long physical products last.

Also, books used to be printed on better paper; modern cheap books will not last as long as the old ones did. I have a couple of collector's edition books printed on acid-free paper...