It's not just the battery life. As I own all Apple devices using Safari would have other benefits but I really need "close all tabs to the right" feature. I'm surprised that there are no add ons to add this functionality in safari. I don't think that iMore is preaching anything that isn't true. Chrome is a great browser but it's using a lot of ram, cpu and power in general. On the flip side you get a lot of benefits as the one where the each tab is separate process. Which is great if you have 100 tabs open and one crashes. Rather then loosing all of them you just loose that one. That is a good trade off for battery life especially if you are on the desktop where this isn't an issue.