If you're working on a large project where you actually edit only several files at the time but you need to peek into other files from time to time as well (usually as a one-time look), the tab bar gets full very quickly and it's almost impossible to find there the file you're looking for.
Well, I do lot of File > Close All Tabs, Close Other Tabs, and Close Tabs to the Right. And I like it that way; I would rather manage my tabs myself.
I haven't figured out why certain tabs are always open whenever I open my project, no matter how much I close them - but that's a different question!
m.
-- matt neuburg, phd = http://www.apeth.net/matt/ pantes anthropoi tou eidenai oregontai phusei Programming iOS 7! http://shop.oreilly.com/product/0636920031017.do iOS 7 Fundamentals! http://shop.oreilly.com/product/0636920032465.do RubyFrontier! http://www.apeth.com/RubyFrontierDocs/default.html