If Biden "isn't a fan" of the idea then this legislation is DOA. There's better things reform can look at, starting with term limits. Lifetime appointments may have made sense in the 18th century, but now it doesn't make so much sense. Especially given the trend of appointing younger justices. I would suggest a 20 year term.

I would also suggest a Senate supermajority should be able to remove a justice at any time, without incurring the process of impeachment. If you can get 2/3 of the U.S. Senate to agree on anything then it must be something seriously impacting the country.

Finally, there needs to be the concept of a quorum. If enough justices aren't able to hear a case due to term expiration or reclusion, then the court can't hear the case at that time.

As always, the Devil is in the details.