All or us who have enjoyed the better-than-average size of our free OneDrive storage are in for an awakening. Please read this: https://blog.onedrive.com/onedrive_changes/. No more free 15GB camera roll, no more free 15GB normal storage (it will be reduced to 5GB). It appears that no one will be grandfathered in, either.
For those who subscribe to Office 365 Home, Personal, or University, the plans for providing unlimited OneDrive have been dropped. The max will be one TB.
The claim is that too many people abused the unlimited storage plans, so now we're all paying.