I wish anyone with even a little power were talking about ditching the position of "Supreme Court Justice" and just drawing for the role by lot from the "lower" federal courts each term. That could be done with a law, not an amendment-there has to be a Supreme Court, and federal judgeships are "during good behavior" (de facto "for life") but Supreme Court Justice per se doesn't have to be a permanent role. The closest I hear anyone talking about is court expansion, but that's a less-effective fix, and one more likely to draw strong push-back and to be unpopular, I think.