The first three octets of a MAC specify the manufacturer of a NIC chipset. That could come in handy for driver debugging.
Manufacturers and firmware versions of storage devices? You can make the argument; perhaps it would have helped figure out the SSD firmware bugs years ago.
But stuff like whether or not you have video capture card or your current system temperature stats? Nah… that’s getting into “identifiable information as toxic waste” territory.
What do you mean, custom firmware? Are you trying to boot a different distro of Linux?
When you have the USB drive plugged in, how are you booting up? What’s the process you’re using?