Well I have no need for emunand. But writing my nand back in case it gets messed up is a nice option to have.Fuses will only be burnt if you boot up your Switch using their bootloader (i.e. basically turning it on normally). If you boot the Switch using either SX OS v1.2 or Hekate, they will not only bypass the fuse check but prevent fuses from being burnt. This is also why it is recommended to have AutoRCM installed because all it takes is one bootup without RCM for the fuses to be irreversibly burnt. Accidents can and do happen.