Saw this article in Business Insider.
The title should really be something like "I switch between iPhone and Android whenever I want because Google owns me - here's a simpleton's way to do it"
I can't argue that the methods described won't let you move easily from platform to platform. But you should realize that you and your data are being sold like a product by Google. Apple, on the other hand, keeps my data encrypted (with a key only I have on my devices) and doesn't sell it. That doesn't mean I couldn't be compromised one day but at least their intention is to make money directly off me and not by selling my data to advertisers.
If you don't mind sharing your life with advertisers then perhaps you should mind all the money they make selling you. In a world where we control our own data perhaps we could shut out the middle men.