their F.A.Q. states that they expect performance not worse than ARM, which sounds like a dealbreaker (there wasn't anything similar in OpenCore movement like… ever!).

Fabrication: these guys do it http://www.lowrisc.org/ and don't forget about chinese production companies who use custom MIPS now — this is a great altarnative for them. Actually, this applies to any government which needs verifiable hardware non-tampered by NATO