I was amused that I still remembered enough about XTree Gold to put it to use this year after booting up a c. 1991 PC that I found in my dad's house. I was able to quickly triage the disk and then use its "secure erase" command to at least attempt to erase personal data before sending the machine to the e-recycler.
Interesting that Wikipedia page says XTree suffered when Windows came with File Manager. File Manager was just a Windows version of "DOSSHELL" which was already a sort of XTree clone.
Used Xtree quite a bit, probably still have a copy from the early 90s, DOS, from my "utils" folder I took everywhere.
Xtree, then Xtree Gold, were part of my essential DOS repair toolkit I used working in mixed-OS shops. I remember a programmer calling it a "toy" as I debugged his hosed DOS setup. Funny how he didn't say that anymore after I'd rapidly found his missing files and sorted out all the silly cruft he'd put in his AUTOEXEC.BAT and CONFIG.SYS files.
30 years laterz and nothing is as fast as Xtree.exe and list.com moving through folders.
Wonder how does it compare with DOS Navigator. Well, if DN would be implemented on a modern OS.