There is loss of data over time as it is edited. There’s so much information, so much written down, so many images, that it can’t possibly all be saved. So people decide what to keep and what gets discarded. And it happens over and over again as time progresses. A lot of old material is even worse off just because it got destroyed, rotted away to illegibility, or just got buried.

That will happen to everything about us as well, except compounded by technological barriers. Modern media like HDDs, SSDs, CDs, and even paper will become unreadable either by degradation or future technological incompatibility - assuming civilization exists in any modern sense in the future.