Well, I'm primarily going to 4.0.1 so I can use GameCube controllers. One of the primary reasons I'm going from Wii U homebrew to Switch is cause it has more convenient controller options, most notably being able to use all four ports of said GameCube Controller Adapter for four player games once I can get N64 up and running. And I hear all firmware below 4.1.0 is the safest.
Don't know what that is.
You didn't update so you could use the Deja vu exploit, right?
Don't know what that is.