Or you can just keep updating your games normally because getting banned doesn't block you from updating games or updating the firmware.
I don't see why you people care if you get banned anyway. If you go online with SX OS, you will be banned no matter precautions you get (even if you do it by booting OFW or erasing all logs). There is no avoiding it.
If you actually update your games via nsp and remain offline, it doesn't matter either because you will not be able to play online anyway because you're remaining offline. Even if you clean your console of every traces of homebrew and erase the logs, decide to go legit, you will still get banned anyway.
If you really want to go online, the only way to do it is to buy a new console, don't use the same account as your banned one (because they will likely ban every Switches associated with an account) and just never install any homebrew or temper with the console in any way, because Nintendo doesn't care if you don't pirate, any form of homebrew will get you a ban eventually.