Data-Driven Music

Minecraft's music should be data-driven, so that we can use resource packs to add new tracks to the game, and alter which songs appear in each category (like "minecraft:music.overworld.badlands" etc.). I would love to be able to full control over what songs appear in each biome (like, for example, making "Endless" be able to play in the Deep Dark).

Having music be data-driven would also probably make it a lot easier for the developers themselves to add new songs to the game in future updates.

Take it step further, and also make Music Discs data-driven! Music Discs should have a component to alter what sound file it plays, so data pack developers can add fully custom discs without replacing the vanilla ones (there are mods that do this, the on the Hermitcraft server for example, so adding that functionality to vanilla would be amazing!).