Photos iCloud Uploading and Updating Issues

Resolved! - after waiting 10 hours of “Updating” status, my issue is now resolved. Everything is sync’d. Looks like the total process took 8 days of solid processing. My library is nearly 700GB, so I guess that makes sense, but indexing and displaying photos vs waiting them to load feel like they should be separate and more transparent.

Update: The status at the bottom of Photos changed from "Updating 73,079 items" to "Updating..." - so maybe that's progress? Still no change in the photos displayed - and the numbers above the status still reads 69,392 Photos, 3,240 Videos (72,632 items) - not the true number on iCloud (73,079).

Update 3: I used Command-Option while opening Photos to start the process of repairing the library. Once complete, the status bar at the bottom now reads "Restoring from iCloud" - so possible progress?

I'm not entirely sure how the various status titles changed. What I do know is that after repairing the library (honestly, not sure there was anything wrong with it, but a re-index can't be a bad thing), the status changed to something I hadn't seen before (Restoring from iCloud...) which gave me some hope. After a few hours of that status, it returned to "Updating", and then after another 10 hours of processing, it was updated. How big is your library? I would recommend the library repair (only takes about an hour), and then see if it doesn't resolve the same way mine did.

Update 2: Now the status is back to "Updating 73,079 items" - am I caught in a loop??