This is incredibly vague "We will be focused on removing old, unused, and inactive content that is not tied to a user account" What is old, unused and inactiv

This is incredibly vague "We will be focused on removing old, unused, and inactive content that is not tied to a user account" What is old, unused and inactive? That could be 10 year old images or 10 month old images. I have no idea. Is an image getting regular hits going to be deleted? Who knows... I guess many will still be on archive.org if someone is late to the party downloading a backup.