iiYese

From exploring this as the only viable alternative to entity disabling we've discovered: - Unsoundness from the limitations of current ECS internals - [Flaws with the approach before in #ecs-dev](https://discord.com/channels/691052431525675048/749335865876021248/1250856257238204497)...

I'm going to raise a concern I've already mentioned on discord. If we have a `Disabled` marker it is easy to define what is considered erroneous for that. Eg. mutating...

# "Fragmenting" I'd like to add some comments about "fragmenting" since that's bound to receive the most questions. We should stop calling it "fragmenting". It places too much emphasis on...