This makes it easier to have single world support enabled by default but able to opt into multi, rather than having opted into single world and it is harder to get back to multiworld.
Tests often need multiworld support since they might be creating and destroying lots of worlds on various threads.
This makes it easier to have single world support enabled by default but able to opt into multi, rather than having opted into single world and it is harder to get back to multiworld.
Tests often need multiworld support since they might be creating and destroying lots of worlds on various threads.