Re: How much control/flexibility over the free W10 download?
http://blogs.windows.com/bloggingwindows/2015/03/16/how-windows-10-achieves-its-compact-footprint/
TL;DR: This "compact footprint" means that Windows is now only 7.8GB of *compressed* filesystem, i.e. 12 CDs of compressed data. This makes it "lightweight and highly mobile"
Come off it Microsoft. Don't install all the crap. There's this thing called The Internet that users could download optional extensions through - if and when they need them.