I read through topics like this one and think I'm way under-geared when I'm in the field. I still run a more-or-less traditional hunting coat--Columbia Ptarmigan--but at 15 years it's much closer to the end than the beginning. Sooner or later it will start leaking shells out of the pockets and than I'll have to do something. Other than shells the only "gear" I routinely carry is a 4' lead and occasionally water. I've even stopped carrying my leatherman after years and years of never using it. It would be devastating and do who-knows-how-much damage to my marriage if my dogs were injured or worse in a way that some of the gear you carry would address, so I probably should carry a bit more.
But here's the semi-serious question. When you get in the truck and move from one spot to another, are you putting on and taking off the vest every time? That seems like a hassle and is one of the reasons I've never seriously considered a technical vest. As someone mentioned above, my thoughts would be different if I spent hours at a time away from the truck.