There is no doubt in my mind the modern technology beats the pants off and the tar out of the old tech.
We had a brand spanking new smoke dragon on the farm about the time Carter got elected (1976?) for which selecting selecting wood for overnight burns in the 20-30%MC range was a legitimate strategy. That was in Kentucky. As a young man I was using my grandpa's c.1870 parlor stove for supplemental heat in North Carolina. For the latter I would load dry wood in the morning before work, dry wood in the evening while I was home, and wood split less than 2 months ago for overnight burns.
In Alaska, I have hard data. I ran a c. Y2K EPA cert non cat for a couple years, and then switched to a factory new catalytic stove in 2014. I had a long haired daughter with two laundry baskets of hair product move out the same summer the catalytic stove came in. My wood consumption dropped somewhere between 20-50% between switching stoves and having the daughter move out. With a few more years of data my best guess is changing stoves (from Y2k non cat to 2014 catalytic) is worth about a 30% savings on wood burnt, and my daughter's hair accounted for the rest.
There is a learning curve on the new stoves. The learning is to put down the fire tools and let the new stove do its thing. The new stoves, with dry fuel, actually require less fire management. With smoke dragons, as taught by my grandpa, the loading door would have to be opened every 30 minutes. With my 2014 catalytic stove I open the door every 12 hours to reload for most of the winter, and 3-4 times per day in really cold weather.
Both of the (pre EPA) smoke dragons I have used ran 'better' with dry wood, but neither could do overnight burns with good fuel.
I think moving from moist fuel to dry fuel is a barrier for many. Local to me that means having my fuel for this coming winter split, stacked and top covered in March instead of August. Back east with all those hardwoods it means getting a year ahead and having two years of splits (minimum) stacked and top covered somewhere on the property. And three years is better.
Finding space for 12 cords (4 cords per year average x 3 years) on 2 acres is problematic in the lower 48, @Ashful
excepted. I have no idea how much less fuel would be required for samey same BTUs in the envelope for someone jumping from 1976 to 2023 technology. For someone making that kind of jump I think the savings on motrin and doctor visits would be more important the the savings on fuel price.