Managing files on an operating system has become a power user tasks. A good chunk of casual users have no clue how files work.

I just spoke with a women who is convinced she has "VLC" file and "windows files" to differentiate different movies. I tried to tell her that those are the programs the operating system is set to use for that file type, but the concept of a file type was completely lost on her.
She got a virus yesterday, blamed it on file sharing to her TV set to play movies. Apparently she used windows media player to file share her movies to another device.
It couldn't possibly be all the torrents she downloads. Also AVG failed her utterly. The virus actually deleted AVG.

I think we are going back to a time when applications opened files. Not files opening applications. I don't look forward to making that step backwards but users have gotten dumber over the years.