Chunk load and 64bit

How about switching chunkloading from 2D to 3D? Bedrock specific (which is already 64Bit for Java edition) Why not switch from 32Bit to 64Bit?
These days, both mobile devices and computers have improved their performance so much that switching to 64-bit is no problem. In addition, if the coordinates exceed 50,000 or 100,000 in any direction in the world at 32Bit, the stuttering becomes worse and the player does not move in that direction when reaching 30 million. Switching to 64Bit eliminates this problem, and travels around 300 trillion blocks or more for some stuttering.
The reason to switch to 3D chunk loading is that, in my experience, Minecraft's world creation method is currently 2D (when using the tickingarea command, only the y-coordinate is 0, and when using the locate command, the y-coordinate is not known). The reason for the limit on the y-coordinate is presumed to be a problem caused by an exponential increase in memory usage when the Y-height of the 2D chunk becomes unlimited. Switching to 3D chunks will fix the y-coordinate display errors in locate and tickingarea, and the y-coordinate will also be able to release the height indefinitely.