Minecraft wiki entry for Development_versions, associated text: Actors
The minecraft:behavior.controlled_by_player goal is now data-driven.
Physics Component's has_gravity is now used to decide whether a mob should apply water gravity, if the mob does not have a Navigation Component.
Ender Crystals can no longer be pushed.
The Squid's rendering is now data-driven.
Minecarts are now data-driven.
This converted minecart rideable, minecarts with chest, with hopper, with command block, and with TNT to be data-driven.