Why? Other than self righteous claims that it is better, there is no actual comparison. Add to that the return to object-oriented, internal-state-driven data management, the implicit magic, plus the indignation of the author, and we have at best a new Backbone. Which the community has moved on from.
You're right, I'm not getting the point, because you're not making one. You may have made a cool thing, but everyone will dismiss it if you immediately make claims of it's impending dominance.
I appreciate your breakdown of the steps you went through, very straightforward in the incremental improvements.
Although, you may want to reconsider your usage of function.length to determine whether to use monadic vs variadic. There are some gotchas that may cause inconsistent results => https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/length.
The reason JavaScript wasnt as necessary for sites back then is because it wasn't supported properly by all browsers, and had some gaping security flaws, so disabling it or not even having it was very common. At the time, prudence dictated the need to build for it. Neither of these are true any longer, so building for that .1% use case is not logical from a time or money perspective.
This article is basically "Pepperidge Farms remembers".