Well I guess they did it to save on the resources your PC needs to have to run RTW. You see 8 is strikingly similar to 2^3... (Unused memory allocated to a memory adress can't be used for storing other data than whatever you expect there to be else bad things may happen. E.g.: suppose an ancillary can be seen as an object and if you put both an 'ancillary' object and an 'trait' object on the same memory adress you can't be sure of what object you get when you read the memory at that adress.)