HP fails to derail claims that it bricks scanners on multifunction printers when ink runs low::HP Inc. has failed to shunt aside claims in a lawsuit that it disables scanners and other functions on its multifunction printers whenever the ink runs low
Soft brick afaik is like when you mess up fastboot and need to use Qualcomms tool to repartition and repair fastboot.
Generally you cannot do this, but the tool leaked for some devices, this it’s softbricked
QC uses the firehose protocol to load software that early, but that’s a good overview
The tools are generally available to flash, but manufacturers may not offer the next signed bootloader as something you can easily download (that one then implements fastboot)
You also need some mechanism to force the PBL to jump to download mode instead of trying to load the next bootloader