While you are not required to use a modpack, it is incredibly useful. A list of pre-approved modpacks can be found in the Discord server.
Armor stand customization (https://www.youtube.com/watch?v=nV9-_RacnoI).
Ability to build nether portals in any shape, or with crying obsidian (https://www.youtube.com/watch?v=WfqUtUhI7qM).