Minecraft wiki entry for Mob_farm, associated text: In practice, however, it is rarely worthwhile to fill the maximum spawnable area with a single farm that delivers mobs to central location. For example, if you plan to spend your time in a less defined position, it might be easier to repeat a simple design several times, ensuring that at least some areas are in the spawn range while limiting complexity. Moreover, transporting mobs long distances for killing makes a farm less efficient because of caps that limit spawning based on the number of mobs already in the loaded areas around the player. The impact of caps is especially important in Bedrock Edition, which has caps that limit population densities as well as a global cap that counts mobs around every player loaded in the world.