I don't think the goal here is that anyone would ever cook for 50 hours on it, it's to show that it CAN cook 50 hours. My Kegs do the same but I've never cooked anywhere close to that long. I've done 20+ hour cooks many times. When I am done, I close the vents and save the coals for the next cook. That's what makes Kamados, this one included, great!
Would I pay $1.6K or $2K for one? Nopetty nope nope. Nada. Negative.