Datapack ideas

All the new updates make datapacks even easier to create and that’s great, but I might have some interesting ideas: For example, what if we could define mob behavior using datapacks? Or custom mob variants for every mob instead of only the ones that are used in-game? Maybe custom components(including model data) for blocks too? Or a property in (block) loot tables that gives a duplicate of the block destroyed? Last one: what if we could define if a consumable is destroyed or just loses durability?