In regards to term limits of Supreme Court justices, some say that only a constitutional amendment could enforce term limits, as current proposed legislation would be unconstitutional. They argue that the relegation of judges to a new form of senior status (described in past bill proposals) runs afoul to the constitutional provision allowing justices to serve “in good Behaviour”, according to Article III Section 1. President Biden supports a system where a President would appoint a justice every 2 years and justices would serve 18 year terms on the Supreme Court.
In regards to term limits of Supreme Court justices, some say that only a constitutional amendment could enforce term limits, as current proposed legislation would be unconstitutional. They argue that the relegation of judges to a new form of senior status (described in past bill proposals) runs afoul to the constitutional provision allowing justices to serve “in good Behaviour”, according to Article III Section 1. President Biden supports a system where a President would appoint a justice every 2 years and justices would serve 18 year terms on the Supreme Court.
https://ace-usa.org/blog/research/research-democratic-governance/pros-and-cons-of-enacting-supreme-court-term-limits/