I'm in favor of term limits on anyone working in the government, elected or appointed. But since the LA Times is for it too they can fuck themselves and this term limit bullshit.
In all seriousness you have to realize that human beings have limits, and those limits get much shallower the older you get. Now a lifetime appointment sounds good and provides just enough theater for someone not paying attention to think it adds some impartiality and objectiveness to the position. If this were even remotely true why wouldn't we make congress a lifetime appointment? (like it isn't already) Hell if the voters thought you were hot shit in your late 30s or early 40s when they first elected you then after four decades removed from the strains of constantly pandering to the masses for your next paycheck must make you the bestest, mostest super honest guardian of civic honor in the world, right? ...
El-Oh-Fucking-EL
In reality the lifetime appointment is a nice election night bonus and boon for the party that happens to be in power. The only real check it has the at some point in time a functioning human (not RBG) will have had enough and hang it up. They can finally write a book, spend some time with family, or just spend all day in your underwear sitting on a lawn chair with your feet in a kiddy pool and a cold beer in your hand wondering what all the poor people are doing. Not bitterly clinging onto any shred of relevance they can get their hands on between catnaps and depends changes. The benefit of the lifetime appointment is only the person appointed knows when that day will come and it adds some valuable instability to our political process. But I'm not sure its a big enough benefit to give up a bench stacked with judges that weren't around when AM radios were high tech and fucking telegraph offices still existed.