In my case a firmware provider went out of business, and in one particular device the firmware gets stuck in an endless boot loop. It tries to calibrate some led's, but forgets to round some differences, so it can never converge to a proper calibration.

Device is bricked, firmware is secured with a signing key, refactoring a new device is pretty hard. The current one needed 10 years of development. I'm on the wait to either patch the firmware by finding the problematic byte (if it's patchable, round() needs much more), or to wait for the original dev willing to release an update on his own. BTW Claude opus got much better than ghidra lately. It's perfect.

I see the value of protected firmware updates, but business has to survive also.