President Biden has (finally!) proposed using the power of Article I to de-politicize Article III:
[W]e have had term limits for presidents for nearly 75 years. We should have the same for Supreme Court justices. The United States is the only major constitutional democracy that gives lifetime seats to its high court. Term limits would help ensure that the court’s membership changes with some regularity. That would make timing for court nominations more predictable and less arbitrary. It would reduce the chance that any single presidency radically alters the makeup of the court for generations to come. I support a system in which the president would appoint a justice every two years to spend 18 years in active service on the Supreme Court.
He also proposed a constitutional amendment to ensure presidents can be held criminally liable for acts while in office, and extending the judicial code of conduct to the Supreme Court.
The thing is, it sure looks like Article I gives the legislature the power to enact term limits on the Court without an amendment. And doing so should command bipartisan support, because it ends the Supreme Court sweepstakes that destabilizes the rule of law.
Of course, one of our parties has strayed a bit from believing in the rule of law, which means it will probably be ours who enacts this reform. So we'll just have to win both houses of Congress and the White House in November, right?