docs: expand explanation of the purpose of persisting un-projected content

[gabrielgrant]

What is it?

• [ ] Feature / enhancement
• [ ] Bug
• [x] Docs / tests

Description

I found the existing explanation a little unclear

Use cases and why

N/A

Checklist:

• [x] My code follows the developer guidelines of this project
• [x] I have performed a self-review of my own code
• [ ] I have made corresponding changes to the documentation
• [ ] Added new tests to cover the fix / functionality

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[manucorporat]

Thank you soo much!

[gabrielgrant]

thanks for taking a look and getting it merged :)