I've been running adjustable strut rods on my Challenger for over 60k miles and 8 years now. I've had no problems with the heims on the strut rods. Not only that, the strut rods I have on the Challenger are the QA1 design, so, tubular aluminum. I don't run seals or boots of any kind on them, and I've had no issues with them at all. My Challenger has been driven in every road condition there is in that time, including snow and probably a few thousand miles on gravel.
As for heims elsewhere, the same Challenger ate the heims in a set of Hotchkis UCA's in less than 7k miles without boots. Hotchkis replaced the heims and provided the boots they sell now (great customer service!), but I'm approaching 7k miles again and I would be surprised if they make it to 10k miles. The UCA heims are under a very different amount of load compared to the strut rods.
Adjustable strut rods are a benefit to every car, even mildly upgraded ones. The stockers were a "one size fits most" deal, and the factory didn't care about how good the alignment was as long as it met the bare minimum specs. With aftermarket bushings being what they are, it's even more likely that your stock strut rods won't be the right length. Even when they are the right length they don't do as good of a job of remaining free from binding as the aftermarket adjustables.