Re: Rule number 0
"Hows that work in the real world though? Does this not mean you have to reboot into Linux everytime you want to check email"
"No. It means you boot into Linux or BSD in the first place.
If you need something that's Windows only and doesn't run under Wine you either reboot into a Windows partition or, preferably, Windows on a VM. And you'd be surprised to find out for how many people that evaluates to never."
I find that I spend most of my time using Linux Mint these days.
I only boot into Windows occasionally to run a Windows only program or game. In the case of Windows 10, it's just to 'play around with things' and to get to know the operating system in case I get any "how do I do this in W10?" questions from family and friends.