The "File" menu is about CRUD operations on file-level objects.

I think eventually (~decades) the concept of the menu bar will go away, but until it does, File is a fine name for the first menu on the bar. I don't know what it will get replaced with, but it will go the same way as the Save icon—a relic that was a good design at some point, but no longer has much basis other than inertia, and will slowly get forgotten as it becomes obsolete.