“There is one idea, though, that has longstanding bipartisan support, a proven record of success, and practical wisdom behind it: term limits. Imposing term limits on Supreme Court justices would be good for the country and the court. It would help ease the bitterness of the confirmation process and make the court more representative of the public’s views. And while conservatives might currently balk in light of their 6-3 majority, it’s a change that would not necessarily advantage either side over the long run.
The most common version of this reform contemplates justices serving nonrenewable 18-year terms, staggered so that one term ends every two years. This would mean that presidents would get to nominate new justices in the first and third years of their own administrations. Retirements and nominations would occur like clockwork. The result would be a court whose membership, at any given time, would reflect the selections of the past 4 1/2 presidential administrations.
Because Article 3 of the Constitution confers life tenure upon all federal judges, term limits would likely require a constitutional amendment.”
https://www.politico.com/news/magazine/2022/07/21/supreme-court-reform-term-limits-00046883