Why have clay Hittite tablets survived more often than wooden writing boards?

Clay tablets have survived more frequently than wooden writing boards because clay was a significantly more durable material for recording information. When inscribed while wet and subsequently dried in the sun or baked in a kiln, clay tablets became nearly indestructible, allowing them to remain intact for thousands of years when buried in archaeological sites.12

In contrast, wooden writing boards—which were typically covered with wax—are highly susceptible to decay and environmental damage. Because wood is an organic material, it does not withstand the passage of time in the same way as fired or sun-dried clay. While Hittite texts frequently mention the use of wooden writing boards, no examples with intact writing have survived to the present day.1