"Nor does THE CHIEF JUSTICE give any serious consideration to the doctrine of stare decisis. For THE CHIEF JUSTICE, the facts that gave rise to Roe are surprisingly simple: "women become pregnant, there is a point somewhere, depending on medical technology, where a fetus becomes viable, and women give birth to children." Post, at ____. This characterization of the issue thus allows THE CHIEF JUSTICE quickly to discard the joint opinion's reliance argument by asserting that "reproductive planning could take . . . virtually immediate account of a decision overruling Roe." Id., at ____ (internal quotations omitted)."