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.