Ya, well I’m thinking of all the possibilities with user roots built in.
I have a “New” folder for each different type of library. I can plop new things there to be easily found later for processing.
So if I’m in doing video things I can right click, “send to root new” (or on a button etc.). Or copy to. Or send to root archive folder. There’s lots of overlap with pics, vids, docs, audio. They all have the same structure, and the same hotkey could just find the root and the explicit paths for those folders could already be set up.
Or search similar in root (will search for x property in all the root, but only the root). I have a video selected that has tags on it, I want to find = ur (user root) tags:similar. No matter what level of folder I’m in, it will recursively search starting at the users/video path for those tags.
Or add selection to file collection root. We could link up a file collection folder with a root. So if I’m in my pictures I can send = pics collection folder. It will see I’m in the pics branch, then send the file to the collections folder I set up in the options. If I’m in the videos it will send that file to the videos file collection folder instead.
Or duplicates search, or mirror actions etc. One click: find selected duplicates in user root. Or find all files with same date created or modified in user root.
The Home button could be set up to send us to that user root. Middle mouse button to open in new tab.
There’s probably a bunch more possibilities. We could already do all this manually, one for each library type, but the user root would let us have one hotkey piggybacking each action (combination “ifpath” hotkeys), and will test where we are to choose what it does.
Nah, I don’t think I’ve had a proper thought in my mind in years. 
It’s who you know, amiright.
For we are not of those who despair without hope. 