Hacking Question Switch NAND backup & restore with modchip installed.

[Natsuru]

So, I'm about to mod my switch with a Trinket M0 and I am deciding what method I am going to use.
Before I decide, I want to know if I choose not to use AutoRCM and blow my fuses during updates and need to restore a NAND backup, because of a bad NSP install for example and the backup is on a lower firmware and I F'd? or does CFW just ignore the fuses all together and allow the switch to run and I can upgrade again?

or am I expected to backup the NAND ever major update just in case.
What do you recommend, AutoRCM or RCM Mode via mod-chip?