What I love about the Ea-Nasir story is the tablet was found in a pile of other tablets, suggesting that Ea-Nasir saved them. Why? Who knows, maybe he found them funny.
You'd save any tablets you have, and might wait until you need it to scrape it clean.
In Mesopotamia there was a period where it was fashionable to use a more rare softer red clay on top of the white clay. Your stylus would cut through the top layer leaving nice white letters on a red background. It made it easier to scrape clean and reuse, but much less durable over time.
The 3.5” floppies of yore.