@astatine@FrailLeaf@meeper@nukie React? No, they don't use the Linux kernel. I don't think they share much code with Wine but I could be wrong about that. Wine translates API calls, it's a compatibility shim; ReactOS just implements the calls directly.
@alyx@p@astatine@nukie@meeper@FrailLeaf stuff like that usually is a nightmare because they have to insist very heavily that the reverse engineering is clean.