> Observables+DOM elements is a leaky abstraction

The DOM itself is also a leaky abstraction. Render cycles are so prohibitively slow that we've started maintaining a parallel DOM and implementing diffing algorithms in JavaScript. As brilliant as that may be, it's also crazy that it's come to that.

This is a problem that should be solved in the browser. HTML5 should add a simple API to transactionally update the DOM and only render after all changes are committed. This would prevent every single framework from having to implement this logic.