I use Total Commander on Windows, Midnight Commander and DoubleCmd on Linux. All nice and instant with plethora of operations. Not sure why Explorer type UI dominates.
Off-topic story time. So, midnight commander has a nice feature where you hit a hot key to drop into a full-screen shell of the tab which is currently selected. Back in the early 2000’s it had some sort of bug where it would sometimes drop you into a shell where PWD was from the _opposite_ tab.
And of course, the one time this bit me was when I issued ‘rm -rf *’, suddenly realized the command was taking waaaay too long, ctrl-c’ed it, and felt the blood drain from my face as I realized I had just lost 1/4 of my mp3’s.
Not a bad first text editor though. Cut my programming teeth with it.