At least zeblote is making mods that are kickass
Me and several others could make better things with the source.
i've heard about a thing where add-ons were uploaded to some amazon network for faster downloading or something
i don't remember much
Yes, badspot has a bot that joins servers to download all their files and then upload them to cloud.blockland.us. I counted them once before he locked the api, and it had over 200000 files stored there.
If you join a server it will first try to download files from the cdn, and only if they aren't found it will load them from the server. This is much faster than loading from the server, but still slow.
For example, instead of downloading the files sequentially and barely using any bandwidth, you could request 50 of them at once. If you have the bandwidth available, this would make your download ~50 times faster.