For those thinking [RBG] being absent from the 2019 SOTU will be any indicator, look back to last year. She wasn't there and likely never planned to be there.

Only 4 Supreme Court justices attend State of the Union

By David K. Li

January 30, 2018

Only four of the Supreme Court’s nine justices showed up Tuesday night for President Trump’s first State of the Union address.

Chief Justice John Roberts was joined by Justices Stephen Breyer, Elena Kagan and the newest member of the bench, Justice Neil Gorsuch.

Justice Ruth Bader Ginsburg, who had been seen nodding off at previous speeches, was scheduled to be in Rhode Island for a talk at a college, according to the Washington Examiner.

Justices Anthony Kennedy and Sonia Sotomayor were travelling, while Justice Samuel Alito hasn’t gone since 2010, the paper said.

https://nypost.com/2018/01/30/only-4-supreme-court-justices-attend-state-of-the-union/