My ‘10 is at 150k and runs like a top. What I think will hamper the later JK’s and JL’s down the road is the engine bay being such a nightmare. They are pretty stout vehicles and the engines are reliable... but they haven’t had to stand the test of time yet. Mileage is one thing but age is what takes out sensors and seals down the road. The 3.8 JK’s may be slower than shit but they are still mechanically simple, really in most ways they’re just as simple as a TJ. The 3.6/ 2.0 is a whole other animal when it comes to underneath the hood which is probably going to encourage people to gut and LS swap down the road. With the early JK’s I can either do that, or god forbid I spin a bearing I can pay $2500 for a jasper rebuilt 3.8 and a couple of 30 racks to have some buddies help me swap it out.Must be someone else sorry. My transmission and engine are still going great at 165,000 miles. I too have benefited from the warranty when they repaired couple of minor leaks from a few gaskets. My 08 has been pretty solid.
The JL in every other way is a pretty darn big Improvement over the JK though.