If you drain the UPS past 50% it really kills the life of the batteries.

In the Enterprise you probably have generator backup. So the UPS only need to keep things running for 30 second to a minute. So that never happens.

Maybe I have just had back luck but syncing my files across all of my devices has always burned me at some point. No matter what software I have used I have overwritten something by accident or I try and delete something and it doesnt get deleted on all device. Or get a bunch of conflicting files and now i need to figure out what file I want etc…

I do use some syncing but it is mostly between only two devices. Often times it is only a 1 way sync. For example photos on my phone get synced to my NAS automatically.

For me keeping all of my files in one place is the way to go. I just have everything on a NAS. (TrueNAS) All of my devices connect to that and i just edit them directly over the network.

I have a VPN for remote access.

What is she using it for? Creative cloud is a huge blob of programs, is she using them all? Or just a handful?

Just run Jellyfin along side Plex and see.