What about the converse question? Why does the filesystem not provide indexing, tabulation, relationships among document, archival tools, tools for merging two

What about the converse question? Why does the filesystem not provide indexing, tabulation, relationships among document, archival tools, tools for merging two diverged versions of a folder tree, etc.? (Is there one that does it? I don't know!). E.g. Why can't I store a slidedeck by slides and show a "document" that is composed of transcluded bits and pieces? I think pondering alternate systems from time to time is valuable.