If you haven't hacked your switch yet but would love to do so, make sure to setup emuNAND for hacks and sysNAND should be kept for your online needs.
A NAND backup should be made beforehand.
If online play is all you want and don't like to hack it just update your system and go the legit way.
on a last note, emuNAND should be kept offline at all times.
Technically, you should be safe by booting your sysNAND in stock OFW through the official bootloader. However eFuses will be burnt, but if it's of no matter to you then you shall not care about that matter so to speak.I read a little, so if I use cfw, and I reboot my console without bootloader, I will use a clean sysNAND and I can play online without ban. It is correct?