Well when each extended movie is 4 hours long, being able to take a break half-way through is welcome. Grab a few more snacks, refill your beer or mixed drink, or take a bathroom break, lol.
One of my friends had never seen the Lord of the Rings trilogy, so I invited him over to my theater room on a Sunday a few years ago and we watched all 3 extended edition movies back to back on the big projection screen. We stated at 9:00 am and finished up about 11:00 pm, with breaks for lunch and supper. He loved the series.