We get it--not all your data gets updated all the time. (A few columns might have been collecting dust for months!). We'd like to make it easier for you to clean those up. Starting in June, we started tracking when we'd seen the latest update -- and now we're pushing it into the interface. In the dataset schema view, check out the new "Last Data Received" feature. Use it to debug your ingest, or to hide obsolete columns.