Hacking Question What is fuse, and burning the fuse?

[Cyan]

this picture tells otherwise.
https://gbatemp.net/threads/is-burning-fuses-a-real-thing.511225/page-2#post-8141419

it's physical fuse, just embedded in an electronic chipset.

 

[spotanjo3]

Oh so when I upgrade my FW the fuses will burn
.. Then it doesn't really matters for those who will never downgrade their FW right ?

Can I ask why people downgrading their FW? From what I heard everything is 100% compatible with the last FW version + a lot of games will only work in high FW version!
Why even thinking of a downgrade ?

No, if your Switch was original 3.0.0 FW and used Daybreak or ChoiNX to update the latest FW. You can downgrade back to 3.0.0 without a problem. Cannot be lower than 3.0.0 FW.

You are right but think about it:

A downgrade is a great tool that you will be able to boot into CFW without keep autoRCM on all the time, or use a dongle nor a USB cable to connect to the PC every time. Who knows.