I’m fine with retention elections with one tweak.
Rather than a vote by all the people, give that power to the state legislatures. The US supreme court might not be so willing to step on the state powers if the state held supreme court justices fate in their hands.
That might be something that could work.
I just don’t see the use in giving the ability to retain judges to the public.
One simply has to look at the senate, and congress too for that matter, to see that’s a non-starter.