I'd love to see something that builds on the work of hyperscript and HAST. They are great models of the DOM. It would be exciting if a template language were syntax sugar.
JSX is easy to reason about because its elements are 1:1 with a single, uniform function call. That feature means JSX is always optional. Sometimes it is even more verbose or less-performant to use JSX than a hyperscript API like specifying optional properties. I think errors and call stacks are clearer than during string interpolation, but that's possibly BS.
Web components offer limited data binding and the hyperscript approach has clear control flow. The templates seem to be a source of confusion in the GH discussions.
There is still something special and pleasant about jquery because its API was a reflection of the domain. As a developer, I want to query for a node (CSS selector, xpath, etc.) to affect change and traverse to other nodes. After a beer or two I'm convinced emacs and org mode approaches are worth emulating in the web.
Great article and linked discussions. Thanks for sharing.