[dirtboy]

What is wrong with this? That is the most clear-cut case for overturning precedent in SCOTUS history, until now.

[DoodleDawg]

What is wrong with this?

Really?

[Jamestown1630]

From Wiki:

Plessy is widely regarded as one of the worst decisions in U.S. Supreme Court history. Despite its infamy, the decision has never been explicitly overruled. But a series of the Court's later decisions, beginning with the 1954 decision Brown v. Board of Education—which held that the "separate but equal" doctrine is unconstitutional in the context of public schools and educational facilities—have severely weakened Plessy to the point that it is considered to have been de facto overruled.

[Spktyr]

Among other things, timing.