Police, taxi or special order cars are only one that got 11/16" tie rod ends and sleeves.
If you like to take turns hard, or drive like I do, the 11/16" tie rods (and sleeves) are the way to go - for is a cheap upgrade (if replacing worn parts to begin with).
If you are not one to take turns excessively hard, then there is nothing wrong with 9/16" parts.
Either item wears at same rate/speed so having larger parts will not make it last longer. What will make it last longer is to get greasable parts - and give a bit of grease every oil change (or so). Also, not driving into deep water or driving in sandy areas will also help prolong tie rods from wearing - but hopefully no one in an FMJ plans on driving off road, in deep water or at the beach??
To be honest, the tie rod sleeve is really the weakest link and the part that flexes on hard turns. Getting solid tie rod sleeves will help even cars with 9/16" tie rods (...but if you have worn tie rods, and do drive hard - you might as well upgrade).
Stock sleeves:
View attachment 47217
Solid (aftermarket) sleeves:
View attachment 47218
BudW