"faint echoes in hidden object and room escape games"
I can also hear faint echoes in rogue-like games. In my youth, I would have thought nothing of devoting hours to a play-through, having my character die, and then starting all over from the beginning. Rogue-likes require the same kind of mindset and dedication as old adventure games.
I realize for some people the journey *is* the destination, but my gaming time is so limited and sporadic that if I don't feel like I'm making significant progress, I'll turn to another game.
To my horror, I think I'm turning into a casual gamer. I even find myself choosing the Easy difficulty on some games (most recently, Pillars of Eternity), just to smooth the progression, when in my youth I wouldn't have been caught dead on Easy.