I wouldn’t be surprised if the demo turned out to be 16 hours long, but only because it looped the story about 7 times. It also wouldn’t surprise me if the battle system is so advanced that you have to select which hand you’ll attack with, how hard you grip the sword, what part of the sword you will be gripping, and you’ll do this 4 times for each character on every single turn - because that level of depth is better and exceedingly fun... And if you fall asleep, it’s only because your brain literally couldn’t handle the blistering excitement and overloaded.
I’m just messing around. I wasn’t a big fan of the first game. It was 4-6 hour game fluffed up into a 40-60 hour game with a bloated battle system, bloated dungeon crawling, and a bloated story. Pretty art style, though.