Our users have written 2 comments and reviews about lf (file manager), and it has gotten 4 likes
At first I was not happy with it because it will never have a tabs feature (mostly for copy-paste in my use case), but then I read it implements a sever-client architecture and you can just open another instance and you'll be able to do copy-paste. This is better for dynamic window manager users though, as you can easily create another instance in a tabbed mode, which is pretty much as if it was another tab. I've used ranger in the past, but it's so slow... lf on the other hand is fast. It doesn't has the best defaults on keybindings as ranger, but you can customize it for your needs.
Brodie Robertson persuaded me it's good, but I've not used it. I'm with nnn.