Author of Vue.js here, I'm glad you included Vue in your framework comparisons. Here's some thoughts regarding your comments on Vue.js: the reason Vue chose to

Author of Vue.js here, I'm glad you included Vue in your framework comparisons. Here's some thoughts regarding your comments on Vue.js: the reason Vue chose to use ES5-only features is that it enables Vue to provide plain POJO syntax without having to resort to dirty checking or virtual DOM diffing. Granted the auto-magical POJO syntax is a somewhat leaky abstraction, but I'd argue that not all leaky abstractions are bad (since by definition any non-trivial abstractions are leaky) - it all depends on its leakiness vs. the benefits provided by the abstraction. TCP is the canonical example of a leaky abstraction in Spolsky's original post yet it has been the foundation of everything we build on the web all along. In fact, even the concept of virtual DOM is a leaky abstraction in itself. My point is, I don't think the leaky abstraction argument raises anything inherently problematic about Vue.js. That said, I really like the project because I'm also a big fan of simplicity. Curious to see if there will be a TodoMVC implementation with Mithril for easier horizontal comparisons of actual code.