Oh that's good to know, thank you for chiming in!
However, one last question: can i keep my system updated (in order to play smash ultimate online, i'm currently on 6.2) without burning my fuses?
Odds are that my switch model isn't a "first generation switch", so i guess there's nothing i can do, however if there was a way to upgrade while keeping the possibility to downgrade it would be great. ^.^
So long as you have AutoRCM set up (and don't accidentally overwrite it), then fuses won't be burned, because the RCM payloads all bypass fuse checks, and AutoRCM prevents you from booting any other way. You can then update using ChoiDujour or ChoiDujourNX, which will automatically apply AutoRCM, or use Atmosphere 0.8.1, which will prevent the normal system update functionality from overwriting AutoRCM.