ALL available meta data should be exposed and forced into tags, categories and folders.

Move everything file-like into the file system. Make emails into folders with tagged files. Link Torrents to their files and folders. Treat zips like folders. etc

Bit more on date range sliders, colors, files as tags and 3d models here:

https://steemit.com/filesystem/@gaby-de-wilde/how-a-file-sys...