To answer the OP, I came from a CJ and YJ and bought my JK a few years ago because I needed something more reliable.
Would not go back to anything older ever simply because the JK does it all for me, it goes offroad better than my previous Jeeps, and takes me to work without any fuss, as well as making long trips to colorado and other states far more enjoyable and less like a week long horseback ride.
2011 Jeep Wrangler JK - 33" BFG KM2s, 2.5" RC BB, ARB bumper, IPF 900XS, Superwinch EPI 9.0, AEV Snorkel
1995 Jeep Wrangler - 4 cyl, 2.5" lift, BFG AT 30s, Ford 8.8, SYE+CV, AX15 swap, ARB snorkel, Aussie locker + loads more - sold
1978 Jeep CJ-7 - 304 V8, TH400 auto and quadratrac
2007 Jeep Liberty - Mother's Jeep, BFG ATs and....mud?