That modern look....

I'd venture to say that guys who are sticking with mostly stock suspension components are also sticking to 14 and 15 inch wheels, because it has to take a ton of money to make those 17's and bigger work. You don't just slap 17's or bigger on a 40 year old torsion bar mopar front end, and you especially don't try that with air bags on an old suspension, because the minute you pump them up your alignment specs go out the window.
There's also something to be said for the size of the factory wheel opening in relation to the size of the wheel and tire. Our older rides were never designed with 17's in mind. The proportions just look out of whack.
And as far as the styling of the newer wheels on older iron? Most are totally garish, no matter what ride you put them on, old or new. Lattice or snow flake designs just look stupid, and you have to paint them black just to hide their ugliness. Never mind trying to clean in between all those nooks and crannies.

Sometimes too much is just that - too much.