It's funny, as a 20+ year macOS user, I've really struggled with file managers that are not Finder.

I don't think it's that Finder is brilliant -- it just encourages a unique set of power user workflows that aren't replicated elsewhere.

For example, Open/Save panels that act as drop targets, and navigate to the dropped file's parent folder. I use this all the time, and it drives me nuts when I can't do this on Linux (Nautilus) and Windows. Enter to rename, too. These habits are very hard to break!