As you and Montanero said, one finds whatever works for oneself.

However, regarding ".............. I will always pick a poncho over a small tarp. It's basically the same thing but can be worn on one's person whereas a tarp is less versatile in that department." My point is if I have appropriate foul weather gear (a good jacket and pants), I have no need to wear the tarp on my person. And when I rig the tarp as a shelter, I can still wear my jacket for additional warmth and protection, whereas if I rig my poncho as a shelter, I can no longer wear it!

Regarding ponchos in heavy brush, I guess there is brush and then there is brush. My experience is that ponchos do get in the way, even when tied around the waist. Ponchos are even more of a hassle when climbing over downed logs, up rocks, or other difficult terrain. Ponchos are also a big problem in strong and gusty winds. They turn you into a big sail. I would not want to be wearing a poncho while walking up an exposed ridge in a strong wind! The wind also blows rain up underneath the poncho and in around your arms. Tying the poncho around you mitigates those issues somewhat, but a properly fitted jacket (and pants) is always superior in those situations.

I also think you overstate the durability issue. A good hard shell jacket designed for technical climbing is extremely durable. I have a Marmot jacket I acquired around 1995. At the time it was their top of the line technical jacket. I only recently replaced it for general use with a new one from Arc'teryx. The Marmot is a bit beat up but still quite functional. I now use it mostly for dirty nasty outside jobs around the home. Otherwise it rides in an emergency bag in my car.

I live, work, and play in a region with highly variable and sometimes extreme weather. Outer clothing for protection from wind, rain, and snow is something I will not compromise on.