Given that we can barely run Wii U games properly, not likely. Maybe Wii games in a couple of years like around the end of life for the Switch.
Should be as long as you have fs_mitm.kip enabled.
Well if you stay offline, you've kinda banned yourself in a way. Yes its a temporary ban that you can lift at any moment but updating your firmware offline with ChoiDujourNX doesn't make it safe for you to return back online. If you stay offline the entire time, then its alright as long as you restore the clean NAND prior to going online. But after that, not only will you have to make another clean NAND backup since you can't restore the same NAND twice (for banning purposes), there aren't that many options for updating without burning fuses. Best you can do is a reboot to RCM by inserting your jig and holding volume + after your console restarts when its finished installing the system update but the success rate of that depends on your jig. And if you do burn fuses, you have to make a new NAND backup anyways since the firmware of your previous NAND backup won't line up with the new fuse count.
Why on Earth would you want to factory reset your Switch?
If your Joy-Con is modded to bridge pins 9 & 10 together, it is not safe to update. If your Joy-Con isn't modded, then it is safe. By the way, the update comes from the firmware, not from the Internet.
Yes but they are not publicly available for good reason.
Just drag and drop everything from one SD card to another. The files aren't tied to the SD card
Oks. I'm using autorcm even before using ChoiDujourNX. So basically what i need to do is update trought ChoiDujourNX because restauring the nand backup will be a pain in the ass.