No point in sticking to one OS like if it was an exclusive cult, since dual-boot (or simply having more than one PC) allows you to taste both. And while I love Linux (mostly stick to flavorless distros like Debian/Arch), for the average user...
I've been considering switching for a while, but I don't really want to re-download 2 terabytes of files, and possibly lose some files that I forget before wiping my drive.
I have dual-bootes into Linux before for a science fair project before...