Some for public web pages and the internet archive, for stackoverflow answers/wikipedia entries and SEO rats, and so on.
How is "your platform" going to help me delete my embarrassing drunk student video from the internet's video sites?
The only way "your platform" can do this, is by actively working to block public access to that video in the first place. Then you can have fun (or not) deleting those 20-100Gb datasets. My point is that that means accepting that you're posting stuff to a walled garden.
