Just a few days ago people were talking about this on the kicad discord. A chinese team made an open hardware x86_64 motherboard and published it not too long ago. Then they were essentially wiped off the face of the planet.

That was the day I learned you literally cannot develop a computer motherboard without Intel's permission. Turns out Intel is no different than the likes of Nintendo.

I doubt that.

Chinese "tinker" has been making countless "x99" motherboard that reuse consumer chipset like h81 or b85.

I don't think Intel approve that

Yes, if you want to go that route, you'll be better off going with RISC-V.

I absolutely want to go with RISC-V longer-term, but it seems we're still a few years away from RISC-V boards being a pragmatic choice for the average workstation, unless I've missed some recent development.