I've still found nothing that can match up to what Wicket was doing 10+ years ago. Your are self-contained, and know how to render their own markup. Any "templates" live with the components and are tightly coupled to them. Control flow lives in code and code alone; your markup specifies ids where your code can attach components, but there's no way for your markup to call back into your code, so you avoid spaghetti. It's wonderful.