For the purposes of this post I’m using “Coreboot” to refer to any combo of Coreboot plus a BIOS alternative like SeaBios.
For most people I think Coreboot offers more theoretical freedom than practical. I’m thinking particularly in terms of “control over your own computing”. With a traditional proprietary BIOS you can do all kinds of things that you can’t do with Coreboot (unless you happen to be a Coreboot developer).
Of course theoretically you can do far more with Coreboot but what good is freedom if you can’t use it?
I am playing a bit of the Devil’s advocate here.