That’s why the texts that do survive are so important. They give us descriptions of the transient experience that doesn’t make it into the archeological record.
Analytical instrumentation has made an incredible jump in sensitivity in the last 10 years. Molecular paleontologists can detect fossilized protein and nucleic acid fragments in remains that are millions of years old. I think we there is going to be a complete change in how archeologists do surveys of more modern historical sights. The molecular fingerprints left in the human record should be much more significant.
Maybe they’ll find evidence of parchment in burials showing writing goes back way further than we currently think
Our view of history is based on what has survived, metal, stone, clay, some papers that have been copied or existed in dry climate.
Anything that can rot and hasn't been reproduced, and was in a wet climate will be lost and removed from the picture we create of history.