I bet that not one of these aftermarket replacement systems have ever been run 100k plus miles in actual real life road conditions, and that thin tubing and design that lacks any real engineering, I doubt has the oem durability.
....with the narrow 5 or 6 inches of width between mounting points and I compare that to the triangulated stock setup. I don't see how the aftermarket stuff would last and hold together. Think of how a man can easily be pushed over if his feet were 10 inches apart compared to his feet being 24 inches apart. A wider spacing equals greater stability. I'd be embarrassed to tell someone that I designed this. The upper control arm mounts are 1 1/2 times as far apart and the UCA carries only a fraction of the impact loads of the lower control arms.