Minecraft wiki entry for Development_versions, associated text: Bandwidth optimization: make sure level event packets only broadcast locally.
Spatial Bandwidth Optimizations are now exposed through a component, minecraft:conditional_bandwidth_optimization.
Spatial Bandwidth Optimizations are now utilized by every actor using minecraft:conditional_bandwidth_optimization.
Added the selector component to raw text which can be used to print entity names in commands such as /tellraw and /titleraw.
Structures are no longer cut off when loaded using the /structure command.