Is there a way to find all apps in Nova Launcher which are NOT in folders (similar to Folder Organizer)? I am contemplating getting a Nova Prime launcher, as opposed to my current combination of Nova free and Folder Organizer.

The main feature of Folder Organizer that I see as a must-have and not sure if possible on Nova is an easy way to find ALL of your installed un-labeled apps (via "Other Applications automatic label") so you can work on relabeling/foldering them (assuming your goal is to have a proper folder for every app you have).

Is there such a feature (easily find all not-in-folders installed apps) in Nova Prime?

If not, a second subquestion is, is there a good replacement launcher among those well known (Apex, GO, etc...) that has such a feature?
Currently, you have a way of (by default) forcing Nova to remove any apps that are in a folder from its main app drawer.

As such, you can simply use the main app drawer configured this way to get a list of un-foldered apps.