> 6 year staggered appointments. So 3 justices terms are up every 2 years. Means one president doesn't get to completely stack the court, but each has a fair impact on it, and we aren't stuck with judges with outdated ideologies forever (unless people vote for it).

That's how the Senate used to work, with state legislatures "electing" the senators.

That was replaced a hundred years ago with direct election of senators.