Merge Resource and Data Packs - Java Edition

Some time ago, it was said that Data & Resource packs were gonna be merged, considering both use the same file structure. This leads me to two suggestions: 1. Load individual packs per world - This way resources only affect a world and not the entire game. 2. The ability to store Data packs like Resource packs and turn them on or off - Similar to when a new world is created, but affects the entire game.