Make the world height infinite

The world height should be increased to be infinite, using 16x16x16 cube chunks instead of the current 16x320x16 chunks (or 16x256x16 pre-1.18). This would allow builders to make large skyscrapers or to-scale mountains, redstone engineers to create even greater contraptions with more vertical space to use, and would allow many other things to be done that nobody has ever thought of before. It would also help to significantly reduce lag on lower render distances, because render distance could be applied vertically and horizontally instead of only horizontally like it does currently.