Rant on:
Yes, IFS can be made to work really well. But its so much cheaper to build a solid axle rig that works even better. I currently own an 05 WK, it rides poor, flexes badly, and is expensive to modify. How is this better than a solid axle rig? Even if we are talking strictly street I don't see how IFS is better. I previously owned a WJ and right out of the box it had a better suspension than this WK. Its on road manners were better, it road smoother, it soaked up the bumps better, flex was slightly better. Plus with about a grand worth of work you could have an unbelievable suspension with tons of travel. And what $1500 or so for a 4" superlift for the WK and you get no real improvment other than being able to fit bigger tires on. To get any real improvement you have to add UCA's, and coilovers...
I've owned a few GM trucks as well, both 1/2 tons and 3/4 tons, they had decent street manners but soon as you hit rough road surfaces the IFS beat you to death and you were rebuilding front ends every 80k miles. At my last job I put around 100,000 miles a year driving various trucks, and by far the best riding and driving trucks were our solid axle, coil sprung Dodge 2500's. 99% of the driving I did for work was pavement, and we still rebuilt those GM ifs every damn year. The most work we ever did to our SFA Dodges was once in a while a ball joint or u-joint started getting stiff.
But if we're talking old school leaf sprung solid axles, well yeah stock to stock I'd take IFS all day long. One of the worst riding trucks i've owned was a 99 F250 SuperDuty, leaf spring SFA with heavy duty springs, road like a tank. But even leaf springs can be made to work well for minimal money, plus your taking a whole lot of wear items out of the suspension as well. And yeah for the high speed desert stuff IFS and IRS seems to be where its at, but look at those trucks, 100% custom and expensive. Heck ifs started taking over desert racing in the 80's with TTB Fords, but even those were HEAVILY modified... Then take a look at a Jeepspeed XJ and how basically stock the front suspension is and see how well that does, pretty darn good.
Hmm, but now that I think about it, I had an 84 Eagle with ifs, that thing friggin' rocked... It road decent and probably had more flex than my WK, it sure had more ground clearance...