After the update failure of 1/29 on my W10 pro computers, I did download and run wushowhide.diagcab on 2/2 on my main computer. It found nothing to do. When looking at the Update History page, I see no evidence of the failed update. It's all gone.
I finally got around to looking at diskmgmt this morning. I still have a 498 mb recovery partition and a 100 mb EFI system partition on my Samsung SSD main drive.
Meanwhile, updates are paused until 3/4 on all computers.