@Kaideadheart Who even are you? You have just showed up after that SX PRO giveaway (which I did too but I digress) and yet you claim that you're a developer of this. And, well I haven't seen any commits from you, just from AnalogMan.
Efuses are real and physical. When you update your FW, the fuse is permanently busted. Theoretically, you could replace the fuses, but it's so expensive that you may as well get another switch.