I pointed that out. I showed a screenshot of Minecraft taking up 214mb RAM alone, which could cut into the rest of the system's RAM allocation. He says that doesn't matter because only small bits of the map are loaded. I point out larger map means more seek, etc. He doesn't want to believe that they were limited to not having a massive map. Considering how much they worked on the game, why would they limit the player unless they had to? Obviously there's a reason.