This is a small request to divide the single switch:
- Preferences - - > Folder Tree - - > Contents - - > Show in Folder Tree: - - > Hidden and system folders (subject to global filters)
into two switches, one for hidden folders, and one for system folders. This would then correspond exactly with the two switches in - Preferences - - > Folders - - > Folder display - - > Hide hidden files AND Hide protected operating system files
which have been disengaged from each other in recent upgrades.
I normally have both "hidden" and "system" turned on in the lister's main display panels. The problem that then occurs with the single switch for the tree is clearest in C:\Users<Username>, where I really do want the hidden folder "AppData" showing in the tree, but having all the system folders displayed in the tree as well makes the tree quite unwieldy.