The new Twilight World

[Dark Jaguar]

That's pretty much exactly what it is. I'm basically saying if they are going to block off access, do it with in game physics. Stick a real wall in some places, or impassible cliffs that I can't climb, or a vast ocean I'll drown in if I try to swim across it (and if I hack it, then the invisible wall can be invoked), or really tall cliffs that result in my death if I jump off them. That's the sort of thing that would enclose the game world but wouldn't take out my immersion. I mean they already do that "in bounds" anyway, it's just the logical extension of using that to create world boundries.