My parents are on 12.04 and will be as long as the long term support lasts. I'm pretty sure forcing them to use Windows would mean a lot of telephone support for the next months. If anything, I would migrate them to another distribution.

I also don't really dislike the Amazon ads. I'm not so much concerned about privacy, but I find them very distracting and awfully implemented. However, it's only one ``sudo apt-get remove unity-lens-shopping``. That is not going to make me change my default distribution.