Open Firmware is still used by IBM Power servers, although not as the "actual" bare metal firmware[1]. It's instead the default firmware interface for the stand

Open Firmware is still used by IBM Power servers, although not as the "actual" bare metal firmware[1]. It's instead the default firmware interface for the standardized "VM", PAPR. A cut-down variant called SLOF is shipped with QEMU for this purpose, either for full emulation, or combined with KVM on Power hardware for accelerated virtualization. [1] Technically there's nothing preventing bare metal hardware from implementing PAPR, but to my knowledge, no currently produced hardware does. Same direction that Sun went with their servers late into the game, not long before their acquisition; sun4v ran everything inside LDOMs, with the default configuration giving all resources to a single LDOM, IIRC.