The NONE option is missing.
Recently I've tested most of the listed filemanagers, and found ALL are missing a basic feature that I'm used to use very often with TkDesk:
Get the pathed filename into the X selection. I have to work with many many files each day, opening them in diverse apps (sometimes started from console), so it can save a lot of clicke-clacke and typo-typing when you have the pathed filname in the X selection. Perhaps I'm one of the last who makes frequent use of the middle mouse button (=Paste), for I still maintain a mouse not broken by the wheel.
MOST of the listed filemangers are just more or less gilded crap. Since the last 20 years there has been no progress in computering except for them shiny bells and whistles. Progressive microsoftification of Linux instead.
I would advocate the good old TkDesk, however it meanwhile got severe dementia: crashing now and then and not catching the drag-o file at first click.
So, I have decided to write my own filemanager (in pure Tcl/Tk) ...
Sounds hilarious, but collecting old mice to transplant buttons for worn out buttons is at least as hilarious. Looks it's impossible to get a mouse without that hilariously shtoopid wheel-on-button construct. -- But I INSIST in working effectively, thus insist in having non-crappy tools.
BTW, almost all modern window managers are also crap. Gnome/KDE are just an n-fold microsofty 1-window system. Fvwm2 could rock, but the Pager is suboptimal.