While we're not quite at the point of making breaking changes yet, this tracker serves to list things that we want to change when we decide to pull the trigger.

Most of these will be things are important enough to justify a breaking change on their own.

• Change voice state cache to index as (guild_id, id) (See discussion in Fix bot voice state connection issues #1533)
• Rename GuildText and co to be GuildTextChannel
• Make Prefixed and Hybrid commands core library features. (The tech debt of hacking in hybrid commands justifies this)