I'm saying what I said. There is no new technology in anybody's control arms that wasn't available in 1993 and a company whose sole purpose is to make money would not spend money on a complex solution if they could have just put stiffer bushings and tubular arms on there instead.
My speculation is that they tried stiffer and multi-durometer bushings and decided the NVH was unacceptable. When manufacturing them new for the first time there is no difference in cost to manufacture a stiff bushing or a soft one. If they had to fabricate tubular arms with welding that costs more than a stamping, but is still less cost and time than welding the brackets on the axle tubes and stamping the chassis brackets and bolting on the quad shocks.
In the aftermarket we always shift compromises around either by spending more money or by trading one characteristic for another. We'll put more free-flowing exhaust on because we're willing to accept louder exhaust sound than the OE would want to produce. We'll put monotube shocks on because we're willing to spend money that the OEM didn't want to spend because if they added one extra dollar to the cost of a thousand parts then the car would cost a thousand more dollars to build.
It's just a lot of hubris to think that any of us are somehow smarter than the teams of engineers and the centuries of man-hours they spend bringing these to market, their job is to make it sell for the greatest profit margin possible and if there is some big expensive assembly present on any car you can bet they looked into every possible avenue for eliminating it.
Regarding the "no noticeable effect" , that is highly subjective. If your car is already modified to have worse NVH than stock with stiff springs, a poorly done lowering job, smashed or urethane motor mounts, a loud exhaust etc then you probably wouldn't notice a small change in vibration. If you aren't a professional driver on prepared courses you probably wouldn't notice a sharp transition when going from suspended to bound or bump-loaded. If you just spent money on fancy powder coated parts you definitely 100% won't be looking for any reason to doubt them and if your vanity convinces you that you need 300+mm tires on a car you're not competitively drag racing then you definitely won't care about any technical considerations because just look at them fancy meats.
Anyway do whatever you want with your car, OP asked about making his ride as smooth as possible and I don't see any reason replacing a factory part designed to increase smoothness and stability with some parts whose literal purpose is to be more stiff, would achieve that goal for him.