"Anyway, there are several things people have proposed adding to the haut genome that would sacrifice our ability to even theoretically have random-assembly children with non-haut, although in practice no one does random-assembly, even haut-wives. And none of these changes have been made to the haut, though there have been ba made with the rearranged retinal anatomy to see if it works as a speculative project in case this constraint is ever deemed obsolete - I'm not sure if wings ever saw live testing."