Should Your Portfolio Live at More Than One Registrar?

 SullysBlog.com: For most of the twenty years I've been buying domains, I've picked registrars on price and convenience. What's the .com renewal? Is the interface tolerable? Can I bulk update nameservers without losing an afternoon? How fast do I get an auth code? Does it play nice with the marketplaces and tools I already use? Those are fine questio...