Also, where does nuget get this stuff from? It doesn't build this stuff for you, presumably, and so the binaries must come from somewhere. So, you just got latest from version control to get the info for nuget - and now nuget has to use that info to download that stuff?

And that presumably means that somebody had to commit the info for nuget, and then separately upload the stuff somewhere that nuget can find it. But wait a minute - why not put that stuff in the version control you're using already? Now you don't need nuget at all.