This is just a quick heads up:
I have the Movie and TV Theme Song/Video plugins, and I found that if movies weren't in their own respective folders, things like themes and backdrops were shared between items. For instance, all of my films had the backdrop for "The Sword in the Stone (1963)" before I moved my media into individual folders. After the move I had to rescan the library.
In the absence of those plugins, if media was not using individual folders, I observed that each asset (like posters, etc.) had the film name/year prepended which works fine until you use plugins like the ones mentioned above.
Is it considered a best practice to put media in their own respective folders? If not, why not? If it is, is that mentioned somewhere in the documentation? Going to the "Movie naming" page on Github doesn't mention that when you are preparing your library, you may want to do use individual folders to ensure a smooth transition.