Hello!
I am also interested in supporting these two files in any file commander. Right now I use FAR - it supports descript.ion and files.bbs ones. The old discussion is marked closed, so I created a new one to add my 2 cents - to describe some more about the feature.
As a simple description file I used to:
1. I download photos from my camera and set a name for a new folder to date when I take photos to keep my collection sorted by date. Then I add a full description for the folder to descript.ion. Frm one hand, I can name a folder in a way '<date> - description' but it has some drawbacks(at least character set is limited, e.g I cannot use ':', '\' etc). Sometimes I add an extra into to certain photos but I do it rarely. Doing this way, I do not need any photo application to read what the photos about
2. I play 'Heroes of might and magic III and IV'. After playing a new map I want to add a short description for the map for the future. I do not know any other way to do it besides using descript.ion/files.bbs
And as an extra usage of decript.ion that I saw in one FAR plugin that I see interesting:
The plugin allows to add tags for files. And then after calling the plugin you get a virtual file system structure that show each tag as separate folder. So, you can browse files separated by your rules. I am not sure it is very useful but I used it for a while.
The descipt.ion/files.bss format for the plugin (it does not break the files.bss usage without plugin):
"file name" file description | tag1, tag2,tag3
Only file name uses quotes because file name can include a space character. From the other hand, the description can be quoted as well since it can contain a pipe character