Always a fun adventure when you buy an old server motherboard to see what state of disarray the BMC is in. Or if you have to patch the license on older boards just to get into it. Usually I just ignore the BMC on any hardware more than 5 years old.
I've been interested but the idea of SPI flasher recovery has always meant I've not bothered actually trying. Maybe I will finally on one of these old boards I have lying around..
Same here; trying to get OpenBMC flashed onto older motherboards can be a rabbit-hole. I generally throw an IP KVM on top if I really need remote control and can't settle on just SSH and a remote power cycle if that fails.