Ah! But they're slow! They're slow to start up, and they are slow to communicate between, right? Well, kind of, not really anymore.
SenFo writes: To many of the people that downloaded Google Chrome last week, it was a surprise to observe that each opened tab ran in a separate process rather than simply a separate thread. Scott Hanselman, Lead Program Manager at Microsoft, discusses some of the benefits of running in separate processes as opposed to separate threads.