Efficiency.
The value of rox's drag & drop to create relative symbolic links has been mentioned several times. For me, it's not just a matter of convenience. I can create symbolic links using the command line. However, often when doing so I'll mis-read the name [or full path when that's needed], or mis-type it.
Combine the ease of creating symbolic links with rox's book-marking function and you have a very efficient system for getting where you want, when you want.
Have folders you often work with, e.g. /mnt/home/, /mnt/home/stuff, /usr/share/applications, /usr/share/pixmaps -- No problem. Book-mark them once. Thereafter they can be reached in a second: open rox, click Bookmarks, scroll, click.
Working with a folder 10 levels deep. NO Problem. File-browse once and book-mark it. After that it's one second away. No longer need it; edit bookmarks, delete.
Don't want to have to execute a SAVE to preserve bookmarks. No problem. Open two rox windows: one on any partition/drive. The second so you can see the folder you want to be opened quickly. Drag that folder into the other window. Select Link(relative). Of course, both partitions must be mounted for the link to function. But that's the point. You can quickly access folders even on partitions you rarely mount.
Using only rox you occasionally need two folders. Right-Click the UP-Arrow. Reposition the windows, then use rox's bookmarks to have them display the two folders you want.
Add /root/my-applications/bin to your bookmarks and you have a convenient location 'on-the-path' for dragging and dropping to create symbolic links to scripts and binaries NOT 'on-the-path'. [Of course, any place on-the-path could have been used].
Recently the Devs have added 'Duplicate' to the Right-Click menu. Great for trying out ideas without jeopardizing something which works. Before that I had to copy into a folder, rename then copy it back. Duplicate is my preliminary step before up-dating web-browsers.
Need a detail view of the contents of a folder. It's one click away.
Using Right-Click menu to provide choices: Often I'll just want to read a pdf. The build-in pdf-viewer is fine for that while a pdf-editor will take longer to open and provide a busier display. By customizing the Right-Click menu, I have the best of both worlds. mtpaint/gimp, abiword/LibreOffice-writer and other combinations can be handled the same way.
Tip about Right-Click 'run-in-terminal': run-in-terminal is a Right-Click option in most Puppys. IMHO, it's an essential command for trying to figure out why something isn't working. [Of course, you could file-browse into the folder holding the file, click the ~ key, then type ./FILENAME. But how efficient is that?] Although it may be built in, it may not be associated with all the file-types you'd want to use it with. AppImages for example. You could Right-Click an AppImage, Select Customize Menu, then drag Run_in_Terminal folder from /usr/local/apps into the window which opens, if you knew where Run_in_Terminal's executable was located. It might, however, be easier to file-browse to a file you know is associated with 'run-in-terminal', Right-Click it, select 'Customize Menu', and leave the widow displaying the symbolic link to 'Run-in-Terminal' open. Then Right-Click an AppImage, select 'Customize Menu' and drag the aforementioned symbolic link into the window which opened for the AppImage file-type and select Copy.
The same copy technique can be used with any other application already on the Right-Click menu for some file-type.
I don't know other file-managers as well as I know rox. If I did, perhaps I wouldn't be as much of a rox-fan.
It is unfortunate that rox is not being actively up-dated/up-graded. I wouldn't expect those accustomed to thunar, pcman or the other file-managers built into the major distros to have an interest in doing so. Perhaps one of our gurus should consider adopting it.