Does Sync really, just not work?

Coffee this morning got my brain engaged enough to write this. Spent three hours yesterday trying to get sync to work on our main Sanctuary mac mini and a Macbook that we will (eventually) use to do remote updates. The Sanctuary mac mini is off during the week and we have no way to remote access, otherwise I'd be scrolling reddit. I used dropbox, I used our local network shared drive and VPN through the macbook, I used onedrive, and I used some other random network storage. Could not get sync to work in the way that edits made to slides on one machine would not show up on the other. Yes we made sure to sync up and down correctly, Yes we spent time making sure all our core PP files were in one place. Just giving up, I figured PP would have something simple like we had in 6, which always worked.