The older (and by older I mean everything before the current generation) jeeps were generally simply designed, quite durable, and a piece of cake to work on.
This current generation is just terrible. E.g. A two piece oil pan? Who does that?
To highlight the horrible mess of us and metric using the current project:
Lug bolts, us.
Caliper slide bolts, us.
Caliper to knuckle, metric.
Axle to hub, us, I think, although all the sockets I had in the 1 3/8" neighborhood were metric, which was slightly too big but worked anyway.
12-point bolts from knuckle to hub, originally metric, but the rusty bolts couldn't hold the torque necessary to remove them. (this is where the bruises and flesh wounds came from) I wound up hammering a slightly smaller us socket on to get them off.