PlanetScale now checks for unused tables during deploy requests and warns users if the table is about to be dropped was recently queried. This feature aims to help developers identify when a table is still being accessed by an application, even after migration. To aid in this process, PlanetScale provides Insights, a query monitoring tool that allows users to track down where queries are coming from and tag them with additional information. By using Insights, developers can narrow down their analysis, identify dependencies on the table, and confidently drop the unused table.