EDIT - To clarify, since we're many levels deep now. I'm specifically talking about file explorer. After 40 years of windows we have an explorer.exe that is still inferior to midnight commander in many ways and uses more memory than Windows XP used in total just to show us the files.

This is incorrect. explorer.exe does more than just "show us the files", it is essentially the entire desktop environment. The taskbar, the start menu, file explorer windows, all the notification area, the quick settings area, etc. are all "explorer.exe".

to bring us back to the original conversation.