Well, just lost two weeks of documents in Ulysses, and it was completely my fault. I feel like an idiot.

Hard drive in the iMac replaced, two weeks ago, restored from backup, never launched Ulysses to sync or make a backup of iCloud documents.

Didn't think to preserve the Library on one of my mobile devices, and iMazing doesn't back up Files. Then deleted the iCloud docs like an idiot.

Another lesson learned.