Now 6 years ago the motivation was to be able to test functionality without the DOM but I think the benefit of a boundary between DOM (& events) and view/application state can still exist today - i.e. there can be a case to keep your (view) components thin.
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I think this is a related concept: Segregated DOM
Now 6 years ago the motivation was to be able to test functionality without the DOM but I think the benefit of a boundary between DOM (& events) and view/application state can still exist today - i.e. there can be a case to keep your (view) components thin.