i don’t have issues with deployment images, but development images are indeed very large, as they are bounded by the uncompressed[1] size of the Swift toolchain which is around 1 GB in size.
this takes several hours for me to download at home (70kb per second), although it takes only a minute or two at my local public library. so whenever i need to download the Swift toolchain locally, i take a stroll down to the library to use their internet connection.
i suppose this is the type of thing that is unnoticeable to people working at large corporate offices but it can be a serious barrier to entry for others looking to get started with Swift.
[1] actually i remembered it is compressed, i just remembered the 1GB number because i am using a two-toolchain setup for cross compilation