Okay. A table would have been helpful.
Here is a text table:
File System: view, add, edit, filter, copy/paste. The AI feature is part of “add”
Photo Library: view, filter, smart albums.
If you search for Keywords in the menus, you will see the menu items. But the main interface is a top-level item with the Info / Edit / etc.
Also, I did not mention Smart Folders. I said Smart Albums. And like any smart album in Nitro, it’s Nitro-specific (and smart albums in Photos are Photos-specific).
I’m sorry you find the keyword function hard to understand. It’s feature-rich, and I had to add a new item to the sidebar to add all of the functionality. That’s why I spent hours writing documentation and making videos. I guess I could have put in an arrow pointing to the keyword button in the right toolbar.