This is actually quite cool - JS inside HTML, rather than the more React-y HTML inside JS.
As I understand it, Ryan Carniato was a major part of this project, and later went on to lead SolidJS, which goes back to the React style HTML in JS. Has he spoken at all about why he went back to that templating style?
Ryan was working on Solid before he joined eBay/Marko. Both projects have benefited from the shared knowledge and approaching a similar solution space from different angles.
He eventually got the opportunity to work on Solid in a more full-time capacity and decided to take it, but still talks with the Marko team from time to time
As I understand it, Ryan Carniato was a major part of this project, and later went on to lead SolidJS, which goes back to the React style HTML in JS. Has he spoken at all about why he went back to that templating style?