Extra tidbit about Octopath Traveler: It seems that in the treehouse segment of the game, it was revealed the game to take 50 - 60 hours to beat, and 80- 100 hours doing all the sidequests
My (locked) thread about how difficulty should be a decision for the developers, not the gamers.
https://gamrconnect.vgchartz.com/thread.php?id=241866&page=1