All chaos.de.to servers base on the simple fact that most scripts and functions are frameworks instead of gamemode scripts.
The sounds were to be the first real Problem of the chaos.de.to servers. Fact is, that most sounds take more then 1 MB to download. If you would add all of the sounds currently in use on each chaos.de.to server together, you would have a download of approx. 50 MB. Using the System as a Library instead of a "simple system to have unproblematic 3D sounds" the download for all servers together shrinked to 3-5 MB.