Can the vulnerability be patched?
If I hypothetically solder the modchip and mod my Switch, but never get into emunand, will I get banned if I go online on sysnand? What about just installing the chip and not modding it?
If I get banned, will my library be unaccessible as it was for the Nintendo 3DS days?
Kind regards.
As said above, the way it glitches is based on the chip hardware itself. So it should be good for the life of the switch.
Theoretically yes installing it and only running sysnand is safe. It still modifies the boot0 and boot1 and modifies the fuses not blowing during an update (which if you update your sysnand, you should use the genuine boot feature). But as far as online play for sysnand, just clicking the button in the bootloader should be just fine.
The biggest issue you need to know is that you need to make sure that you're always booting into sysnand. If you click the cfw button without setting up emunand first, it's going to be running cfw on your sysnand and not the emunand.
Your library is still safe, however you'll no longer be able to access it if you don't have it already downloaded. To redownload games, etc, you'll need a new switch. However your account will be just fine.
I only reason Nintendo will ban your account is because of some sort of payment fraud. Either by doing a credit card chargeback on a purchase, or by installing a game by game code that has had payment issues (like buying a game from a CD key website. You have no idea if the credit card used to buy a key was stolen or not. If it was, your account will be the one that gets banned because of it).
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