What happened to Phoenix "BONUS GUIDES" (esp. File Uploads)

In the old versions of Phoenix “hexdocs” there was a section called “BONUS GUIDES” with some seemingly useful pieces in it. Like for example this one:


These seem to be gone from later versions of the docs and search [file] uploads doesn’t return anything useful. What was wrong with those guides? And is there a replacement somewhere?

I think most of those guides were moved around. I think the major missing one is handling file uploads in non-live apps. There’s a guide for LiveView though.

That’s in fact the one that prompted me to ask. Wondering what thought process caused its disappearance.