Hubcentric, torque to spec, and good quality. There's no reason they shouldn't last the needs and lifetime of your truck.
Like I said earlier, I have had no issues with aftermarket. so take what you want from that.My Drw has a huge front spacer. But the tires still sit far in. No extra width. That spacer is a bit beefier than the POS brodozer nonsense out there as well. The bolts rust in place pretty quickly, they ain't going nowhere, and the axle is designed this way. This is definitely an apples to oranges comparison.
I would never run an aftermarket wheel spacer on anything. Get the correct wheels, and trim your fenders to keep the tires tucked in properly.
Factory installed is completely different from bolt on in the driveway.To another point above, most dually trucks have a ~6" spacer bolted onto the front axle.
Steel wheels vs alloys will effect the need for stud length too. If you put the spacers on with steel wheels you can get by with more compared to the next guy with alloy wheels which are thicker.Excuse my ignorance - but are folks all talking about the same thing here? I see some of the pics showing the hub-centric bolt on style, but there are the 'slip' on style that require longer wheel studs too. The slip on style seem to come in thinner options but in some cases offer you all the spacing you need due to minor tire rub and also don't require an extra set of studs....but may require longer aftermarket studs, not sure if this is better or worse than the bolt on style.
That analogy is apples to oranges. Spacers can also be used to put the contact patch and scrub in the stock location when using non stock wheels.. Contact parch and scrub are often changed when using non stock wheels and larger tires, changes often made for clearance and.or stability .The dually argument is not accurate or viable. They use them in combination with the high off-set dually wheel so that the contact patch is in the right spot. They maintain scrub radius which is very important to road feel and stress on steering and suspension components.