I have a 2018 Duramax. Bought it in '19 with only 3k miles on it. It now has about 43k, so I'm good for about 10k per year. 90% of that is back and forth to work. I had an '07 GMC 2500HD 6.0 gasser before this one. Due to GCWR the trailers I had bought for the GMC were the typical 10,000# dump trailer and equipment trailer. Both are still sufficient for my needs so I haven't gone bigger just because I have the diesel with a little more capacity. Although, I will say that the diesel works a lot less harder to pull the same loads, especially from a dead stop and up and down the mountains and ridges in my area. It pulls much better, and feels safer and more controllable down hill. I love it.
I recently drove my Dad's '16 1/2 ton 5.3L Silverado over one of the local mountain roads and I think my diesel would have pulled 10,000# just as well as Dad's truck pulled itself up the mountain. Maybe a little exaggeration but it sure did feel weak compared to my truck. When your 2500HD diesel is also your daily driver you tend to forget how spoiled you are with it. Enough so that unless I drop to only towing on my 3,000# trailer I don't think I'll ever go back to a half ton. I would rather have more power and stability than I actually need, than not have enough.
My Duramax is an LTZ so it has all the bells and whistles, pretty much only short of the painted bumpers of a High Country. I see nothing wrong with having all the options along with a workhorse of a truck. It is my daily driver and right now it's not in the cards to have a second vehicle for myself. I already have 4 vehicles on the road between my truck, the wife and kids. It's a do everything vehicle including some road trips. If I was on a farm, bringing in firewood, construction vehicle or something, I can see just getting a base model work truck and a second nicer vehicle for day to day. Otherwise, call it a lux truck or whatever I really don't care. It has nothing to do with the Jones's, status symbol, or whatever. One vehicle serves every purpose or need and I have yet to feel like I wanted something more in a truck. And right now I have zero regrets compared to a half ton. Diesel prices, DEF, fuel filter, 10 qt. oil changes, larger and heavier brakes, parts, etc. is all well worth it.