I think the library system does have good reasons to exist and whether to use it depends totally on your needs.
Essentially, the library system and the traditional filesystem are the same, to the extent that they both filter and group files by a select group of criteria. In the case of the filesystem, the criteria are file path, sizes, date added, etc. In the case of a library system, the criteria are specific types metadata that are meaningful for the type of media it manages (genres and artists for music, publishers and categories for books, etc.). Their features do intersect, and you can have both worlds in one system with some hacks, but the convenience and design also matter.
For me, I read ebooks but don’t hoard them, so I don’t need Calibre to manage my petite amount of epubs -- folders and filenames are enough. But I do listen to a lot of music, so I can’t manage efficiently without a music library software like iTunes. A person who is a voracious reader but rare listener, however, may have a choice just opposite to mine, which is also completely reasonable.
Essentially, the library system and the traditional filesystem are the same, to the extent that they both filter and group files by a select group of criteria. In the case of the filesystem, the criteria are file path, sizes, date added, etc. In the case of a library system, the criteria are specific types metadata that are meaningful for the type of media it manages (genres and artists for music, publishers and categories for books, etc.). Their features do intersect, and you can have both worlds in one system with some hacks, but the convenience and design also matter.
For me, I read ebooks but don’t hoard them, so I don’t need Calibre to manage my petite amount of epubs -- folders and filenames are enough. But I do listen to a lot of music, so I can’t manage efficiently without a music library software like iTunes. A person who is a voracious reader but rare listener, however, may have a choice just opposite to mine, which is also completely reasonable.