> Features that only work if you have really tight integration ... Programs updating file name when you rename from the file manager ... Even systems like MacOS are going to struggle
MacOS has actually had this one in the bag for a couple of decades now (likely due to their really tight integration).
Doesn't even Windows do that? Rename a file in File Explorer, and the app that has it open pops up a dialogue saying "File So-and-so has been renamed.", or some such. But maybe that's because the app has to do the work of keeping track of it (though probably via hooks into the OS / Explorer), so it's not fully automatic? Can't recall if all apps do it, think I've only noticed it in a few.
MacOS has actually had this one in the bag for a couple of decades now (likely due to their really tight integration).