At last - not one but two easily obtainable, affordable, owner controlled, no-PSP/ME, libre firmware boards that are new enough to be useful and have 99% feature parity with commercial closed source systems. (100% if we had SR-IOV/ARI support)
https://www.raptorengineering.com/coreboot/kgpe-d16-bmc-port-status.php
The only thing missing from it now is serial over IPMI although you can use serial via SSH and screen at the moment, and of course the ability to change the password without re-compiling.
Even if you don't need a BMC you still might want to install it for the OS-independent fan control, otherwise you can maybe send your ASMB module to someone else who needs one.
It would be nice if someone is able to locate a source for the ASMB4/5 modules for those who do not have one.
They appear quite simple - no reason they should cost $50 or w/e - perhaps a good samaritan could figure out how to make them?