And photo back up has never included metadata like locations when backing up to OneDrive making it usekdss

Onedrive, that useless app that creates a mess in the desktop if you have a laptop and a desktop like most users

This is what's so amazing to me, a primary feature of cloud storage is multi-device usage. But by default this ridiculous product causes a mess if you use it on 2 or more computers, and many apps save app data to my documents so you have useless (at best) or conflicting at worst bloat being copied between computers. I want to use it but Microsoft makes it a huge pain if I do.

Most users do not own two computers.

No, but the biggest users who pay the most do.

A huge percentage do, whether it's most or not would be a stupid metric by which to design a cloud storage product in such a way that causes issues when one does sign in on multiple devices.

well, onedrive is the ms solution to dropbox which is main purpose is syncing between computers