I think we should have age limits on any political position, including that of judges. 70 is about the limit where physical and mental acuity is pretty likely to be slipping away, but having the energies to struggle through confrontations is the basis of being a judge. Character is important, but that means nothing if the judge in question becomes a Merrick Garland.

So both term and age limits, to help prevent the stratification of power and politics.