It's infuriating that they refuse to use Power10 that came in 2021, but I understand why they did it.
I think for normal users, something like a normal libreboot Desktop/Laptop would work better and be more cost effective than this.
I thought that the main target users for this is the server owners, but I doubt it would attract them now, especially since the company does not develop new technologies to make their offerings more attractive.
3mdeb would be an alternative for people using servers, but they mainly to IOT and workstations I think.
And, no idea, but I assume there are server mainboards that are supported by Coreboot.
Afaik Google runs all their servers on Coreboot.
I as a mere mortal just spent reviving an "old" Thinkpad 250. I mean it had a 1TB SSHD in it, which never was full, a random old SATA SSD and it runs Xonotic!
That BIOS is 3 years EOL, and has strange settings, like not enabling TPM 2.0 or 2 strange remote management / antitheft services baked in, which could be permanently disabled.
Also disabling everything related to Network on the UEFI helped.