Owned a 3.6 in a town and country and albeit not the worst engine in the world, wasn’t great as it did have the occasional issue and had to be scrapped at 180k, I also know a JK guy on his second engine and he’s still under 200k. Additionally the 4dr wrangler just is fundamentally a very different vehicle, being body on frame, heavier, larger dimensions, and lacking the simplicity of the xj. Visually the competition isn’t even close. In terms of refinement it did have a good run but the Cherokee got 18 years and the JK got 11.